Season Episode

Finding Elements

• Find elements using document.querySelector () function

create

 div.insertAdjacentHTML('beforeend', '<h1>gua</h1>')
删除

let pwd = document.querySelector('#id-input-password')
pwd.remove()

event

Event is used to process a response mechanism

1. Get the button

loginButton = document.querySelector('#id-button-login')

 2. Declare a function to be executed after clicking the button

C const 
licked = function () { 
    log ( 'button is clicked to') 
}

// 3. Add an event using addEventListener function, it has two parameters 
// The first is the name of the event, the second is the function will be automatically called after the incident, called the callback function 
loginButton.addEventListener ( 'click ', clicked)