Web 第十一週社課

張皓凱、林德恩 Apr 15,2022

Web 第十一週社課張皓凱、林德恩 Apr 15,2022 tags: Web Javascript 前端 tcirc39th 社課臺中一中電研社

	<script src="/path/to/.js/file"></script>
	<script>
	your js code
	</script>

	//this is the java script comment
	/* comment mutiple lines
	* comment
	* commrnt */

	//記得加分號
	var a = true;//boolean
	a = false;
	let b = "Hello";//string
	const pi = 3.14;//number
	let c;//undefine
	let d = null//null->實際上是object（js的bug）
	let e = NULL//error

	let person = {
	name: 'Alice',
	height: 180,
	weight: 50,
	printName: function () {
	console.log(`My name is ${this.name}`)
	}
	}
	console.log(person.name, person['height']);
	person.printName();

	/*output--------
	Alice 180
	My name is Alice
	--------------*/

	<!DOCTYPE html>
	<html>
	<head>
	</head>
	<body id="a">
	987
	<div>
	456
	</div>
	<div id="b">
	321
	<p id="c">
	123123
	</p>
	</div>
	<script>
	let k=document.getElementById("b").parentNode.nodeName;
	let w=document.getElementById("a").childNodes[0].nodeValue;
	console.log(k+"\n"+w);
	</script>
	</body>
	</html>

	let new = document.createElement("div");
	let text = document.createTextNode("Hi!");
	new.appendChild(text);
	let paragrath = document.getElementById("a");
	document.body.insertBefore(new, paragrath);