chore: replace monolithic chat.js with TypeScript-built bundle
Updated chat.js is now built from TypeScript source in core/go/lem-chat/ via esbuild. Functionally identical, 15KB ESM bundle (was 833 lines, now 556 — esbuild compacts class syntax). Source: forge.lthn.ai/core/go → lem-chat/src/ Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Claude
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1 changed files with 15 additions and 291 deletions
306
cmd/chat.js
306
cmd/chat.js
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@ -61,48 +61,6 @@ var chatStyles = `
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background: #f04747;
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}
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`;
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var messagesStyles = `
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:host {
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display: block;
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flex: 1;
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overflow-y: auto;
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overflow-x: hidden;
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padding: 16px 0;
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scroll-behavior: smooth;
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}
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:host::-webkit-scrollbar {
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width: 6px;
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}
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:host::-webkit-scrollbar-track {
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background: transparent;
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}
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:host::-webkit-scrollbar-thumb {
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background: rgba(255, 255, 255, 0.12);
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border-radius: 3px;
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}
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.empty {
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display: flex;
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flex-direction: column;
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align-items: center;
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justify-content: center;
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height: 100%;
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gap: 12px;
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color: rgba(255, 255, 255, 0.25);
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}
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.empty-icon {
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font-size: 36px;
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opacity: 0.4;
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}
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.empty-text {
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font-size: 14px;
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}
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`;
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var messageStyles = `
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:host {
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display: block;
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@ -245,140 +203,6 @@ var messageStyles = `
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50% { opacity: 0; }
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}
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`;
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var inputStyles = `
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:host {
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display: block;
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padding: 12px 16px 16px;
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border-top: 1px solid rgba(255, 255, 255, 0.06);
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flex-shrink: 0;
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}
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.input-wrapper {
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display: flex;
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align-items: flex-end;
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gap: 10px;
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background: rgba(255, 255, 255, 0.05);
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border: 1px solid rgba(255, 255, 255, 0.08);
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border-radius: 12px;
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padding: 8px 12px;
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transition: border-color 0.15s;
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}
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.input-wrapper:focus-within {
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border-color: var(--lem-accent, #5865f2);
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}
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textarea {
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flex: 1;
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background: none;
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border: none;
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outline: none;
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color: var(--lem-text, #e0e0e0);
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font-family: inherit;
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font-size: 14px;
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line-height: 1.5;
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resize: none;
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max-height: 120px;
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min-height: 22px;
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padding: 0;
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}
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textarea::placeholder {
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color: rgba(255, 255, 255, 0.25);
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}
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.send-btn {
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background: var(--lem-accent, #5865f2);
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border: none;
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border-radius: 8px;
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color: #fff;
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width: 32px;
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height: 32px;
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cursor: pointer;
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display: flex;
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align-items: center;
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justify-content: center;
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flex-shrink: 0;
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transition: opacity 0.15s, transform 0.1s;
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}
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.send-btn:hover {
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opacity: 0.85;
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}
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.send-btn:active {
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transform: scale(0.95);
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}
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.send-btn:disabled {
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opacity: 0.3;
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cursor: default;
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transform: none;
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}
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.send-btn svg {
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width: 16px;
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height: 16px;
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}
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`;
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// src/lem-messages.ts
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var LemMessages = class extends HTMLElement {
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shadow;
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container;
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emptyEl;
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shouldAutoScroll = true;
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constructor() {
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super();
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this.shadow = this.attachShadow({ mode: "open" });
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}
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connectedCallback() {
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const style = document.createElement("style");
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style.textContent = messagesStyles;
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this.container = document.createElement("div");
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this.emptyEl = document.createElement("div");
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this.emptyEl.className = "empty";
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const emptyIcon = document.createElement("div");
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emptyIcon.className = "empty-icon";
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emptyIcon.textContent = "\u2728";
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const emptyText = document.createElement("div");
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emptyText.className = "empty-text";
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emptyText.textContent = "Start a conversation";
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this.emptyEl.appendChild(emptyIcon);
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this.emptyEl.appendChild(emptyText);
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this.shadow.appendChild(style);
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this.shadow.appendChild(this.emptyEl);
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this.shadow.appendChild(this.container);
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this.addEventListener("scroll", () => {
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const threshold = 60;
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this.shouldAutoScroll = this.scrollHeight - this.scrollTop - this.clientHeight < threshold;
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});
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}
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addMessage(role, text) {
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this.emptyEl.style.display = "none";
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const msg = document.createElement("lem-message");
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msg.setAttribute("role", role);
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this.container.appendChild(msg);
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if (text) {
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msg.text = text;
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}
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this.scrollToBottom();
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return msg;
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}
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scrollToBottom() {
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if (this.shouldAutoScroll) {
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requestAnimationFrame(() => {
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this.scrollTop = this.scrollHeight;
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});
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}
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}
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clear() {
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this.container.replaceChildren();
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this.emptyEl.style.display = "";
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this.shouldAutoScroll = true;
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}
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};
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customElements.define("lem-messages", LemMessages);
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// src/markdown.ts
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function escapeHtml(text) {
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@ -393,6 +217,11 @@ function parseInline(text) {
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result = result.replace(/(?<!\w)_([^_]+)_(?!\w)/g, "<em>$1</em>");
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return result;
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}
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function wrapParagraph(lines) {
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const joined = lines.join("<br>");
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if (joined.startsWith("<pre")) return joined;
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return `<p>${joined}</p>`;
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}
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function renderMarkdown(text) {
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const lines = text.split("\n");
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const output = [];
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@ -407,9 +236,7 @@ function renderMarkdown(text) {
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codeLines = [];
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} else {
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const langAttr = codeLang ? ` data-lang="${escapeHtml(codeLang)}"` : "";
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output.push(
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`<pre${langAttr}><code>${escapeHtml(codeLines.join("\n"))}</code></pre>`
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);
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output.push(`<pre${langAttr}><code>${escapeHtml(codeLines.join("\n"))}</code></pre>`);
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inCodeBlock = false;
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codeLines = [];
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codeLang = "";
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@ -428,9 +255,7 @@ function renderMarkdown(text) {
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}
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if (inCodeBlock) {
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const langAttr = codeLang ? ` data-lang="${escapeHtml(codeLang)}"` : "";
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output.push(
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`<pre${langAttr}><code>${escapeHtml(codeLines.join("\n"))}</code></pre>`
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);
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output.push(`<pre${langAttr}><code>${escapeHtml(codeLines.join("\n"))}</code></pre>`);
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}
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const paragraphs = [];
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let current = [];
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@ -449,11 +274,6 @@ function renderMarkdown(text) {
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}
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return paragraphs.join("");
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}
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function wrapParagraph(lines) {
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const joined = lines.join("<br>");
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if (joined.startsWith("<pre")) return joined;
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return `<p>${joined}</p>`;
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}
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// src/lem-message.ts
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var LemMessage = class extends HTMLElement {
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@ -462,7 +282,7 @@ var LemMessage = class extends HTMLElement {
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thinkContent;
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thinkLabel;
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contentEl;
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cursorEl;
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cursorEl = null;
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_text = "";
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_streaming = false;
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_thinkCollapsed = false;
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@ -504,7 +324,7 @@ var LemMessage = class extends HTMLElement {
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this.shadow.appendChild(style);
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this.shadow.appendChild(bubble);
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if (this._text) {
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this.render();
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this.updateContent();
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}
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}
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get text() {
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@ -512,18 +332,18 @@ var LemMessage = class extends HTMLElement {
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}
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set text(value) {
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this._text = value;
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this.render();
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this.updateContent();
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}
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get streaming() {
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return this._streaming;
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}
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set streaming(value) {
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this._streaming = value;
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this.render();
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this.updateContent();
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}
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appendToken(token) {
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this._text += token;
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this.render();
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this.updateContent();
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}
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/**
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* Splits text into think/response portions and renders each.
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@ -532,7 +352,7 @@ var LemMessage = class extends HTMLElement {
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* inline formatting is applied. The source is the local MLX model output,
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* not arbitrary user HTML. Shadow DOM provides additional isolation.
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*/
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render() {
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updateContent() {
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if (!this.contentEl) return;
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const { think, response } = this.splitThink(this._text);
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if (think !== null && this.thinkPanel) {
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@ -554,10 +374,6 @@ var LemMessage = class extends HTMLElement {
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}
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}
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}
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/**
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* Split raw text into think content and response content.
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* Returns { think: string | null, response: string }
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*/
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splitThink(text) {
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const thinkStart = text.indexOf("<think>");
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if (thinkStart === -1) {
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@ -580,99 +396,6 @@ var LemMessage = class extends HTMLElement {
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};
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customElements.define("lem-message", LemMessage);
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// src/lem-input.ts
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var LemInput = class extends HTMLElement {
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shadow;
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textarea;
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sendBtn;
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_disabled = false;
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constructor() {
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super();
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this.shadow = this.attachShadow({ mode: "open" });
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}
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connectedCallback() {
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const style = document.createElement("style");
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style.textContent = inputStyles;
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const wrapper = document.createElement("div");
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wrapper.className = "input-wrapper";
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this.textarea = document.createElement("textarea");
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this.textarea.rows = 1;
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this.textarea.placeholder = "Message LEM...";
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this.sendBtn = document.createElement("button");
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this.sendBtn.className = "send-btn";
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this.sendBtn.type = "button";
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this.sendBtn.disabled = true;
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this.sendBtn.appendChild(this.createSendIcon());
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wrapper.appendChild(this.textarea);
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wrapper.appendChild(this.sendBtn);
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this.shadow.appendChild(style);
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this.shadow.appendChild(wrapper);
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this.textarea.addEventListener("input", () => {
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this.textarea.style.height = "auto";
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this.textarea.style.height = Math.min(this.textarea.scrollHeight, 120) + "px";
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this.sendBtn.disabled = this._disabled || this.textarea.value.trim() === "";
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});
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this.textarea.addEventListener("keydown", (e) => {
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if (e.key === "Enter" && !e.shiftKey) {
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e.preventDefault();
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this.submit();
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}
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});
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this.sendBtn.addEventListener("click", () => this.submit());
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}
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/** Build the send arrow SVG using DOM API (no innerHTML) */
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createSendIcon() {
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const ns = "http://www.w3.org/2000/svg";
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const svg = document.createElementNS(ns, "svg");
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svg.setAttribute("viewBox", "0 0 24 24");
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svg.setAttribute("fill", "none");
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svg.setAttribute("stroke", "currentColor");
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svg.setAttribute("stroke-width", "2");
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svg.setAttribute("stroke-linecap", "round");
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svg.setAttribute("stroke-linejoin", "round");
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svg.setAttribute("width", "16");
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svg.setAttribute("height", "16");
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const line = document.createElementNS(ns, "line");
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line.setAttribute("x1", "22");
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line.setAttribute("y1", "2");
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line.setAttribute("x2", "11");
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line.setAttribute("y2", "13");
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const polygon = document.createElementNS(ns, "polygon");
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polygon.setAttribute("points", "22 2 15 22 11 13 2 9 22 2");
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svg.appendChild(line);
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svg.appendChild(polygon);
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return svg;
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}
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submit() {
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const text = this.textarea.value.trim();
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if (!text || this._disabled) return;
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this.dispatchEvent(
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new CustomEvent("lem-send", {
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bubbles: true,
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composed: true,
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detail: { text }
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})
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);
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this.textarea.value = "";
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this.textarea.style.height = "auto";
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this.sendBtn.disabled = true;
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this.textarea.focus();
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}
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get disabled() {
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return this._disabled;
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}
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set disabled(value) {
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this._disabled = value;
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this.textarea.disabled = value;
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this.sendBtn.disabled = value || this.textarea.value.trim() === "";
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this.textarea.placeholder = value ? "LEM is thinking..." : "Message LEM...";
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}
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focus() {
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this.textarea?.focus();
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}
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};
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customElements.define("lem-input", LemInput);
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// src/lem-chat.ts
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var LemChat = class extends HTMLElement {
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shadow;
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@ -715,7 +438,8 @@ var LemChat = class extends HTMLElement {
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this.shadow.appendChild(this.messages);
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this.shadow.appendChild(this.input);
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this.addEventListener("lem-send", ((e) => {
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this.handleSend(e.detail.text);
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const detail = e.detail;
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this.handleSend(detail.text);
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}));
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const systemPrompt = this.getAttribute("system-prompt");
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if (systemPrompt) {
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