Summary of common JavaScript tags and methods

JavaScript can be directly interpreted and executed by the browser. It can better reduce server pressure and improve program operation efficiency. The following editor will share with you common JavaScript tags and methods through this article. You need Friends, let’s learn together

What is javascript?

(1) JavaScript is a scripting language based on Object and Event Driven and has security properties.

(2) JavaScript is a scripting language developed by Netscape. The programs written by it can be embedded into HTML pages and interpreted and executed directly in the browser.

(3) JavaScript can be directly interpreted and executed by the browser, which can better reduce server pressure and improve program operation efficiency.

//Event (event monitoring):

//Tag object.Event monitoring.function(){Executed code, find object, find attributes, change attributes };

Event source. Trigger an event. Call a method. The method finds the execution code, finds the object, finds the attributes, and changes the attributes (or uses attributes, add, delete, modify, and check)

          onmouseover Move the mouse over an element

                                                                                                                                                                                                                     onmouse                                                #着)

# 着Press

keyboard Press it and then release it (that is, click on and release it again)

## on on 着 着 着 着 着At that time)

OnClick Mouse Press it (click)

的

Onmousemove (Move Press and does not press Du Xing)
## On onmouseout mouse moved to a certain element (when the mouse is placed)

onmouseup The mouse button is released (when the mouse is released)

onresize The window or frame is resized

window.onresize

onsubmit form submission

onblur The element loses focus

onfocus The element gets focus

The browser is blank The width and height of the area (that is, the width and height of the browser)

Width: document.documentElement.clientWidth;

Height: document.documentElement.clientHeight;

// How to get the object:

This #                                                                                                                                                                                                                                                                  document. ("a");//The tag name is not unique. Get all a tag objects and generate an array.

Document.getElementsByClassName("a");//The className is not unique. Get all the classNames. The label object of a generates an array

Document.getElementsByName("a");//The Name attribute is not unique, get all the label objects whose Name is a, and generate the array

It’s the entire tag

After obtaining the object, if you want to get the content in the label, you can call the object of the object

tag object .innerHtml: Represents the text between the label

# #.Innerhtml = New data: is to assign the content between the labels

// Bouncing Frame:

## Alert (): A normal Pop-up window

Confirm(): Pop up a pop-up window for confirmation and cancellation

prompt(): Pop-up with input box

settimeOut (func, n); // timer, execute the program in Func after n seconds, the unit is milliseconds

## (s); And the time mark generated by setTimeout

                                                                                              using   using using               through ’ s through through out through out through outps throughps out through out through through through ’''''''''''''''''''s‐‐after'' through through‐‐ across between- between basis to)) ​                

#//String conversion to numeric type parseInt();

var h =document.documentElement.clientHeight;//Get the height of the browser

var w =document.documentElement.clientWidth;//Get the width of the browser

var p1 = document.getElementById("id");//Get the object of the label with ID id

iw=parseInt(w)//Convert w into numeric type

ih=parseInt(h)

p1.style.height=ih+ 'px';//Assignment

p1.style.width=iw+'px';

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