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MutString
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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" /> | |
| <meta http-equiv="X-UA-Compatible" content="ie=edge" /> | |
| <title>Static Template</title> | |
| </head> | |
| <body> | |
| <script> | |
| const mutString = new MutString("test"); | |
| mutString[2] = "x"; | |
| document.body.textContent = ` | |
| ${mutString[2]} | |
| ${mutString} | |
| ${mutString.match(/^../)} | |
| ${mutString.bold()} | |
| ${mutString.length} | |
| `; | |
| function MutString(str) { | |
| const list = [...str]; | |
| return new Proxy( | |
| {}, | |
| { | |
| get(target, key, recv) { | |
| if (key === Symbol.toPrimitive) { | |
| return () => list.join(""); | |
| } | |
| if (typeof String.prototype[key] === "function") { | |
| return String.prototype[key].bind(list.join("")); | |
| } | |
| if (1 / key) { | |
| return list[key]; | |
| } | |
| if (key === "length") { | |
| return list.length; | |
| } | |
| return Reflect.get(new String(list.join("")), key, recv); | |
| }, | |
| set(target, key, value) { | |
| list.splice(key, 1, ...String(value)); | |
| list.splice(0, list.length, ...list.filter(ch => ch)); | |
| } | |
| } | |
| ); | |
| } | |
| </script> | |
| </body> | |
| </html> |
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