How to set scroll bar position in javascript

How to set the scroll bar position in javascript: 1. Put the vertical scroll bar at the top, the code is [(window.scrollTo(0,0);]]; 2. Put the vertical scroll bar at the bottom, the code is [window .scrollTo(0,document.body.scrollHeight)】.

##The operating environment of this tutorial: windows7 system, javascript version 1.8.5, DELL G3 computer.

How to set the scroll bar position in javascript:

JS controls the position of the scroll bar:

window.scrollTo(x,y);

The vertical scroll bar is on top (window.scrollTo(0, 0);

The vertical scroll bar is set to the bottom window.scrollTo(0,document.body.scrollHeight)

JS controls the TextArea scroll bar to automatically scroll to the bottom

document.getElementByIdx_x('textarea').scrollTop = document.getElementByIdx_x('textarea').scrollHeight

Get the distance from the top of the scroll bar

function getScrollTop(){
var scrollTop=0;
if(document.documentElement&&document.documentElement.scrollTop){
scrollTop=document.documentElement.scrollTop;
}else if(document.body){
scrollTop=document.body.scrollTop;
}
return scrollTop;
}

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