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js2js.html
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<!DOCTYPE html><html lang="ja"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width"><link rel="icon" href="data:">
<title>JavaScript → AST → JavaScript</title>
</head><body>
<h1>JavaScript → AST → JavaScript</h1>
<main>
<div class=diveditor id=divprog></div>
<div class=diveditor id=divast></div>
<div class=diveditor id=divprog2></div>
</main>
<a href=https://github.com/code4fukui/DNCL3/>src on GitHub</a>
<style>
h1 {
margin: 0;
}
.diveditor {
width: calc(33% - .5em);
padding: .1em;
display: inline-block;
height: calc(100vh - 6em);
}
a {
color: gray !important;
}
</style>
<script type="module">
import { parseModule } from "https://code4fukui.github.io/acorn-es/parseModule.js";
import escodegen from "https://code4fukui.github.io/escodegen/escodegen.js";
import { monaco } from "https://code4fukui.github.io/monaco-editor/monaco.js";
export const makeEditor = (div, language) => {
const editor = monaco.editor.create(div, {
language,
autoIndent: true,
//autoIndent: "none",
//formatOnPaste: true,
//formatOnType: true,
suggestOnTriggerCharacters: false, // トリガーキャラクターでの補完を無効化
acceptSuggestionOnEnter: 'off', // Enterでの補完選択を無効化
parameterHints: false, // パラメータヒントを無効化
quickSuggestions: false, // 自動的に補完候補を表示しない
inlineSuggest: { enabled: false }, // インライン補完を無効化
tabSize: 2,
minimap: { enabled: false },
//overflow: "auto",
automaticLayout: true,
theme: "vs-dark",
});
window.addEventListener("resize", () => {
editor.layout();
});
return editor;
};
const prog = makeEditor(divprog, "javascript");
const ast = makeEditor(divast, "JSON");
const prog2 = makeEditor(divprog2, "javascript");
const removeStartEnd = (json) => {
for (const name in json) {
const v = json[name];
if (typeof v == "object") {
removeStartEnd(v);
} else if (name == "start" || name == "end") {
delete json[name];
}
}
};
const onchange = () => {
const src = prog.getValue();
try {
const astjson = parseModule(src);
removeStartEnd(astjson);
ast.setValue(JSON.stringify(astjson, null, 2));
prog2.setValue(escodegen.generate(astjson));
} catch (e) {
console.log(e);
//ast.setValue(JSON.stringify(e, null, 2));
ast.setValue(e.toString());
prog2.setValue("");
}
};
//prog.onDidChangeModelContent = onchange; // なぜか初回のみ
let bkval = null;
setInterval(() => {
const txt = prog.getValue();
if (bkval == txt) return;
onchange();
bkval = txt;
}, 500);
const firstprog = `const height = 176;
const weight = 64;
const height_m = height / 100;
const bmi = weight / (height_m * height_m);
console.log("BMIは", bmi);
if (bmi < 18.5) { console.log("低体重"); }
if (bmi >= 18.5 && bmi < 25.0) { console.log("普通体重"); }
if (bmi >= 25.0 && bmi < 30.0) { console.log("肥満（１度）"); }
if (bmi >= 30.0 && bmi < 35.0) { console.log("肥満（２度）"); }
if (bmi >= 35.0 && bmi < 40.0) { console.log("肥満（３度）"); }
if (bmi >= 40.0) { console.log("肥満（４度）"); }
`;
prog.setValue(firstprog);
onchange();
</script>
</body></html>