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1342 lines (1042 loc) · 27.5 KB
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Native JavaScript Code Beautifier</title>
<style>
* {
box-sizing: border-box;
}
body {
margin: 0;
font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
background: #0f172a;
color: #e2e8f0;
}
.app {
width: min(1400px, 96%);
margin: 30px auto;
}
h1 {
margin-bottom: 6px;
}
.subtitle {
color: #94a3b8;
margin-top: 0;
}
.toolbar {
display: flex;
flex-wrap: wrap;
gap: 10px;
margin: 20px 0;
}
select,
button {
border: 1px solid #334155;
border-radius: 8px;
padding: 10px 14px;
background: #1e293b;
color: #e2e8f0;
cursor: pointer;
font-size: 14px;
}
button:hover,
select:hover {
background: #334155;
}
.primary {
background: #2563eb;
border-color: #2563eb;
}
.primary:hover {
background: #1d4ed8;
}
.editor {
display: grid;
grid-template-columns: 1fr 1fr;
gap: 15px;
}
.panel {
display: flex;
flex-direction: column;
}
.panel-title {
padding: 10px 12px;
background: #1e293b;
border-radius: 8px 8px 0 0;
color: #94a3b8;
font-size: 13px;
}
textarea {
width: 100%;
min-height: 600px;
resize: vertical;
border: 1px solid #334155;
border-top: 0;
outline: none;
padding: 16px;
border-radius: 0 0 8px 8px;
background: #020617;
color: #e2e8f0;
font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
font-size: 14px;
line-height: 1.6;
tab-size: 4;
}
.status {
margin-top: 10px;
color: #94a3b8;
font-size: 13px;
}
@media (max-width: 900px) {
.editor {
grid-template-columns: 1fr;
}
textarea {
min-height: 400px;
}
}
</style>
</head>
<body>
<div class="app">
<h1>Code Beautifier</h1>
<p class="subtitle">
Native JavaScript • No dependencies • Multiple programming languages
</p>
<div class="toolbar">
<select id="language">
<option value="javascript">JavaScript</option>
<option value="typescript">TypeScript</option>
<option value="json">JSON</option>
<option value="css">CSS</option>
<option value="html">HTML</option>
<option value="xml">XML</option>
<option value="sql">SQL</option>
<option value="python">Python</option>
<option value="java">Java</option>
<option value="c">C / C++</option>
<option value="csharp">C#</option>
<option value="php">PHP</option>
<option value="go">Go</option>
<option value="rust">Rust</option>
<option value="yaml">YAML</option>
</select>
<select id="indent">
<option value="2">2 spaces</option>
<option value="4" selected>4 spaces</option>
<option value="8">8 spaces</option>
<option value="tab">Tabs</option>
</select>
<button class="primary" id="beautify">Beautify</button>
<button id="minify">Minify</button>
<button id="copy">Copy</button>
<button id="download">Download</button>
<button id="clear">Clear</button>
</div>
<div class="editor">
<div class="panel">
<div class="panel-title">Input</div>
<textarea id="input" spellcheck="false"
placeholder="// Paste your code here
function hello(name){console.log('Hello, '+name)}"></textarea>
</div>
<div class="panel">
<div class="panel-title">Output</div>
<textarea id="output" spellcheck="false"></textarea>
</div>
</div>
<div class="status" id="status">
Ready
</div>
</div>
<script>
"use strict";
/*
* Native Multi-language Beautifier
* No external dependencies.
*/
const input = document.getElementById("input");
const output = document.getElementById("output");
const language = document.getElementById("language");
const indentSelect = document.getElementById("indent");
const status = document.getElementById("status");
function getIndent() {
return indentSelect.value === "tab"
? "\t"
: " ".repeat(Number(indentSelect.value));
}
function setStatus(message) {
status.textContent = message;
}
/* ---------------------------------------------------------
Generic lexical scanner
--------------------------------------------------------- */
function tokenize(code) {
const tokens = [];
let current = "";
let quote = null;
let comment = null;
for (let i = 0; i < code.length; i++) {
const c = code[i];
const n = code[i + 1];
/* Line comment */
if (!quote && !comment && c === "/" && n === "/") {
if (current) {
tokens.push(current);
current = "";
}
let value = "//";
i += 2;
while (i < code.length && code[i] !== "\n") {
value += code[i++];
}
tokens.push(value);
i--;
continue;
}
/* Block comment */
if (!quote && !comment && c === "/" && n === "*") {
if (current) {
tokens.push(current);
current = "";
}
let value = "/*";
i += 2;
while (i < code.length) {
value += code[i];
if (code[i] === "*" && code[i + 1] === "/") {
value += "/";
i++;
break;
}
i++;
}
tokens.push(value);
continue;
}
/* String */
if (!comment && (c === "'" || c === '"' || c === "`")) {
if (!quote) {
if (current) {
tokens.push(current);
current = "";
}
quote = c;
current = c;
continue;
}
current += c;
if (c === quote && code[i - 1] !== "\\") {
tokens.push(current);
current = "";
quote = null;
}
continue;
}
if (quote) {
current += c;
continue;
}
/* Whitespace */
if (/\s/.test(c)) {
if (current) {
tokens.push(current);
current = "";
}
continue;
}
/* Symbols */
if ("{}[]();,:.".includes(c)) {
if (current) {
tokens.push(current);
current = "";
}
tokens.push(c);
continue;
}
/* Operators */
const two = c + n;
const three = two + code[i + 2];
if (
["==", "!=", "<=", ">=", "=>", "++", "--",
"&&", "||", "+=", "-=", "*=", "/=", "??",
"?.", "**", "<<", ">>", "::"].includes(two)
) {
if (current) {
tokens.push(current);
current = "";
}
tokens.push(two);
i++;
continue;
}
if (
["===", "!==", ">>>", "**="].includes(three)
) {
if (current) {
tokens.push(current);
current = "";
}
tokens.push(three);
i += 2;
continue;
}
if ("=+-*/%<>!&|?".includes(c)) {
if (current) {
tokens.push(current);
current = "";
}
tokens.push(c);
continue;
}
current += c;
}
if (current) {
tokens.push(current);
}
return tokens;
}
/* ---------------------------------------------------------
JavaScript / TypeScript
--------------------------------------------------------- */
function beautifyJavaScript(code) {
const tokens = tokenize(code);
const indent = getIndent();
let level = 0;
let line = "";
const lines = [];
function write(value) {
line += value;
}
function trim() {
line = line.trimEnd();
}
function newline(force = false) {
trim();
if (line || force) {
lines.push(indent.repeat(Math.max(0, level)) + line.trim());
}
line = "";
}
function previous() {
return tokens[index - 1];
}
let index = 0;
while (index < tokens.length) {
const token = tokens[index];
const prev = tokens[index - 1];
const next = tokens[index + 1];
if (token.startsWith("//")) {
if (line.trim()) {
write(" " + token);
newline();
} else {
write(token);
newline();
}
index++;
continue;
}
if (token.startsWith("/*")) {
if (line.trim()) {
write(" " + token);
newline();
} else {
write(token);
newline();
}
index++;
continue;
}
if (token === "{") {
if (line && !line.endsWith(" ")) {
write(" ");
}
write("{");
newline();
level++;
index++;
continue;
}
if (token === "}") {
if (line.trim()) {
newline();
}
level--;
write("}");
if (next !== ";" && next !== "," && next !== ")" && next !== "]") {
newline();
}
index++;
continue;
}
if (token === ";") {
trim();
write(";");
/*
* Do not break semicolons inside for(...)
*/
let parens = 0;
for (let j = index - 1; j >= 0; j--) {
if (tokens[j] === ")") parens++;
if (tokens[j] === "(") {
if (parens === 0) break;
parens--;
}
}
if (parens === 0) {
newline();
} else {
write(" ");
}
index++;
continue;
}
if (token === ",") {
trim();
write(",");
if (next) {
write(" ");
}
index++;
continue;
}
if (token === ".") {
trim();
write(".");
index++;
continue;
}
if (token === "(") {
trim();
write("(");
index++;
continue;
}
if (token === ")") {
trim();
write(")");
index++;
continue;
}
if (token === "[") {
trim();
write("[");
index++;
continue;
}
if (token === "]") {
trim();
write("]");
index++;
continue;
}
/*
* Operators
*/
if (
["=", "+", "-", "*", "/", "%", "==", "===",
"!=", "!==", "<", ">", "<=", ">=", "=>",
"&&", "||", "??", "+=", "-=", "*=", "/=",
"?", "|", "&"].includes(token)
) {
trim();
write(" " + token + " ");
index++;
continue;
}
/*
* Keywords that commonly begin a new statement
*/
if (
["if", "else", "for", "while", "switch",
"catch", "finally", "function", "class",
"try", "do"].includes(token)
) {
if (line.trim() &&
!line.trim().endsWith("(")) {
newline();
}
write(token);
if (next !== "(" && next !== "{") {
write(" ");
}
index++;
continue;
}
/*
* else / catch after closing brace
*/
if (token === "else" || token === "catch" || token === "finally") {
trim();
if (line.endsWith("}")) {
write(" ");
}
write(token);
if (next === "{") {
write(" ");
} else {
write(" ");
}
index++;
continue;
}
/*
* Normal words / strings / numbers
*/
if (
line &&
!line.endsWith(" ") &&
prev !== "." &&
prev !== "(" &&
prev !== "[" &&
prev !== "{" &&
!["++", "--"].includes(token)
) {
write(" ");
}
write(token);
index++;
}
if (line.trim()) {
newline();
}
return lines.join("\n");
}
/* ---------------------------------------------------------
JSON
--------------------------------------------------------- */
function beautifyJSON(code) {
const indent = getIndent();
try {
const parsed = JSON.parse(code);
return JSON.stringify(parsed, null, indent);
} catch (error) {
/*
* JSON5-ish fallback.
*/
return beautifyBraces(code);
}
}
/* ---------------------------------------------------------
HTML / XML
--------------------------------------------------------- */
function beautifyHTML(code) {
const indent = getIndent();
code = code
.replace(/>\s+</g, "><")
.replace(/</g, "\n<")
.replace(/>/g, ">\n");
const raw = code
.split("\n")
.map(x => x.trim())
.filter(Boolean);
const lines = [];
let level = 0;
for (let line of raw) {
if (line.startsWith("</")) {
level--;
}
if (
line.startsWith("</") ||
line.startsWith("<!")
) {
lines.push(indent.repeat(Math.max(0, level)) + line);
} else {
lines.push(indent.repeat(level) + line);
if (
line.startsWith("<") &&
!line.startsWith("<!") &&
!line.startsWith("<?") &&
!line.startsWith("<input") &&
!line.startsWith("<img") &&
!line.startsWith("<br") &&
!line.startsWith("<hr") &&
!line.startsWith("<meta") &&
!line.startsWith("<link") &&
!line.includes("</")
) {
level++;
}
}
}
return lines.join("\n");
}
/* ---------------------------------------------------------
CSS
--------------------------------------------------------- */
function beautifyCSS(code) {
const indent = getIndent();
code = code
.replace(/\/\*[\s\S]*?\*\//g, m => "\n" + m + "\n")
.replace(/\{/g, "{\n")
.replace(/;/g, ";\n")
.replace(/\}/g, "\n}\n");
const raw = code
.split("\n")
.map(x => x.trim())
.filter(Boolean);
let level = 0;
const lines = [];
for (const line of raw) {
if (line === "}") {
level--;
}
lines.push(indent.repeat(Math.max(0, level)) + line);
if (line.endsWith("{")) {
level++;
}
}
return lines.join("\n");
}
/* ---------------------------------------------------------
SQL
--------------------------------------------------------- */
function beautifySQL(code) {
const indent = getIndent();
code = code
.replace(/\s+/g, " ")
.replace(/\s*,\s*/g, ", ")
.replace(/\s*\(\s*/g, " (")
.replace(/\s*\)\s*/g, ") ");
const keywords = [
"SELECT",
"FROM",
"WHERE",
"GROUP BY",
"ORDER BY",
"HAVING",
"LIMIT",
"OFFSET",
"JOIN",
"INNER JOIN",
"LEFT JOIN",
"RIGHT JOIN",
"FULL JOIN",
"CROSS JOIN",
"UNION",
"UNION ALL",
"INSERT INTO",
"VALUES",
"UPDATE",
"SET",
"DELETE FROM"
];
const regex = new RegExp(
"\\b(" +
keywords
.sort((a, b) => b.length - a.length)
.map(x => x.replace(/ /g, "\\s+"))
.join("|") +
")\\b",
"gi"
);
code = code.replace(regex, "\n$1");
const lines = code
.split("\n")
.map(x => x.trim())
.filter(Boolean);
return lines
.map((line, i) => {
return i === 0 ? line : indent + line;
})
.join("\n");
}
/* ---------------------------------------------------------
Python
--------------------------------------------------------- */
function beautifyPython(code) {
const indent = getIndent();
const lines = code.split("\n");
let level = 0;
const output = [];
for (let raw of lines) {
let line = raw.trim();
if (!line) {
output.push("");
continue;
}
/*
* Python dedent keywords.
*/
if (
/^(elif|else|except|finally)\b/.test(line)
) {
level = Math.max(0, level - 1);
}
/*
* Basic operator spacing.
*/
line = line
.replace(/\s*=\s*/g, " = ")
.replace(/\s*\+\s*/g, " + ")
.replace(/\s*-\s*/g, " - ")
.replace(/\s*\*\s*/g, " * ")
.replace(/\s*\/\s*/g, " / ")
.replace(/,\s*/g, ", ");
output.push(indent.repeat(level) + line);
/*
* Block starters.
*/
if (line.endsWith(":")) {
level++;
}
}
return output.join("\n");
}
/* ---------------------------------------------------------
C-like languages
--------------------------------------------------------- */
function beautifyCLike(code) {
/*
* Java, C, C++, C#, Go, Rust and PHP
* can share a basic brace formatter.
*/
return beautifyBraces(code);
}
/* ---------------------------------------------------------
Generic brace formatter
--------------------------------------------------------- */
function beautifyBraces(code) {
const indent = getIndent();
const tokens = tokenize(code);
let level = 0;
let line = "";
const lines = [];
function newline() {
if (line.trim()) {
lines.push(
indent.repeat(Math.max(0, level)) +
line.trim()
);
}
line = "";
}
for (let i = 0; i < tokens.length; i++) {
const token = tokens[i];
if (token.startsWith("//")) {
if (line.trim()) {
line += " " + token;
} else {
line = token;
}
newline();
continue;
}
if (token === "{") {
line = line.trimEnd() + " {";
newline();
level++;
continue;
}
if (token === "}") {
if (line.trim()) {
newline();
}
level--;
line = "}";
if (
tokens[i + 1] &&
tokens[i + 1] !== ";" &&
tokens[i + 1] !== ","
) {
newline();
}
continue;
}
if (token === ";") {
line = line.trimEnd() + ";";
newline();
continue;
}
if (token === ",") {
line = line.trimEnd() + ", ";
continue;
}
if (token === "(") {
line = line.trimEnd() + "(";
continue;
}
if (token === ")") {
line = line.trimEnd() + ")";
continue;
}
if (token === "[") {
line = line.trimEnd() + "[";
continue;
}
if (token === "]") {
line = line.trimEnd() + "]";
continue;
}
if (token === ".") {
line = line.trimEnd() + ".";
continue;
}
if (
["=", "+", "-", "*", "/", "%",
"==", "===", "!=", "!==",
"<", ">", "<=", ">=", "&&",
"||", "=>", "+=", "-=", "*="].includes(token)
) {
line = line.trimEnd() + " " + token + " ";
continue;
}
if (
line &&