Javascript 基礎

變數

var x = 'x';
let y = 'y';
const z = 'z';

宣告

var message;

字串

var message = '哈囉';
var name = "alincode";

數字

var num1 = 1;
var num2 = 1.5;

等於

• ===：Strict equality
• ==：Loose equality

var x = 5;
console.log(x == 5); 
console.log(x == "5");
console.log(x === "5");

陣列

var people = [{
    firstname: 'ailin',
    lastname: 'liou'
  },{
    firstname: 'Jane',
    lastname: 'Doe'
  }
];

var lang = ['中文', '英文'];

// 陣列長度
lang.length;

lang.forEach(function(item) {
    console.log(item);
});
// do something...

物件

var people = {
    firstname: 'ailin',
    lastname: 'liou'
};

函式

function greet() {
    console.log('哈囉');
}

greet();

callback 函式

var lang = ['中文', '英文'];

function callback(item) {
    console.log(item);
}

lang.forEach(callback);

引用外部程式 / 模組

var LoginPage = require('../pageobjects/login.page');
var path = require('path');