JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://getfirebug.com/firebug-lite-debug.js"></script>
<!-- disregard this pane, html is shown in the "result" pane -->




































































<h4><strong>&larr; Code Example from <a href="http://www.javascriptenlightenment.com/" target="_blank">JavaScript Enlightenment Book</a> by <a href="http://www.codylindley.com" target="_blank">Cody Lindley</a></strong></h4>

<p>JavaScript code is executed on page load. Click the "Run" button in the top bar to re-run the JavaScript code. Output is logged to the <a href="http://getfirebug.com/firebuglite" target="_blank">Firebug Lite</a> console below &darr;.</p>

JavaScript

// myArrayとArray.prototypeはtoLocaleString()メソッドを持っていない
var myArray = ['foo', 'bar'];
console.log( myArray.hasOwnProperty('toLocaleString') );

console.log( Array.prototype.hasOwnProperty('toLocaleString') );

console.log( Object.prototype.hasOwnProperty('toLocaleString') );

console.log( Object.prototype.hasOwnProperty('toLocaleString') );



// toLocaleString()はObject.prototype.toLocaleStringで定義されている
console.log( myArray.toLocaleString() ); // 出力：'foo,bar'