selenium-webdriver quick start

selenium-quickstart.js

var webdriver = require('selenium-webdriver'),
    By = require('selenium-webdriver').By,
    until = require('selenium-webdriver').until;


// open chrome
var driver = new webdriver.Builder().withCapabilities(webdriver.Capabilities.chrome()).build();


// outset
driver.get('https://www.facebook.com/');
driver.wait(driver.getTitle(),randTime())


// login FB
.then(function(tit){

	var ele = {
		email: driver.findElement(By.id('email')),
		pass: driver.findElement(By.id('pass')),
		btnlogin: driver.findElement(By.id('u_0_v'))
	};
	ele.email.sendKeys('帳號');
	ele.pass.sendKeys('密碼');
	ele.btnlogin.click();

	return driver.wait(driver.getTitle(),randTime());
})

// go page
.then(function(tit){
	var keywords = "馬習會";
	driver.get('https://www.facebook.com/hashtag/'+keywords);
	return driver.wait(driver.getTitle(),randTime());
})


// featch all of HashTags after got web title
.then(function(tit){

	// get all of elements by css selector
	// return array
	return driver.findElements(By.css('a[href*=hashtag]')).then(function(el) { return el; });
})


// elements.forEach  
// wait for all of promises were resolved
.then(function(arr){

	var proms = [];
	arr.forEach(function(el){
		// add all of promise
		proms.push(
			el.getText().then(function(txt){
				console.log(txt);
				return txt;
			})
		);
	});
	return Promise.all(proms);
})


// next step
.then(function(what){
		
	// do something here

})



/*
	wait rand time
*/
function randTime() {
	var min = arguments[0] || 500,
		max = arguments[1] || 3000;
    return Math.random() * (max - min) + min;
}

Very helpful example! But why are you waiting a random amount of time?