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
## on on 着 着 着 着 着At that time)
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)
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
// 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
#//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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