Analysis of javascript uniform motion implementation method _ javascript tips-js tutorial

This article mainly introduces the implementation method of javascript uniform motion, and analyzes the specific implementation steps and precautions of JavaScript Uniform Motion in the form of examples, for more information, see the example in this article. We will share this with you for your reference. The details are as follows:

Procedure:

1. Clear the timer
2. Enable Timer
3. Whether the motion is completed: a. If the motion is completed, the timer is cleared; B. If the motion is not completed, continue.

Uniform Motion stop condition: the distance is close enough to Math. abs (of course distance-target distance) <Minimum motion distance

The running effect is as follows:

Example of Uniform Motion of p (simple motion:

 JavaScript Uniform MotionScript window. onload = function () {var oBtn = document. getElementById ('btn1 '); var oDiv = document. getElementById ('p1'); oBtn. onclick = function () {startMove (oDiv, 300) ;}; var timer = null; function startMove (obj, iTarget) {clearInterval (timer ); timer = setInterval (function () {var iSpeed = 0; if (obj. offsetLeft <iTarget) {iSpeed = 7;} else {iSpeed =-7;} if (Math. abs (obj. offsetLeft-iTarget) <7) {clearInterval (timer); obj. style. left = iTarget + 'px ';} else {obj. style. left = obj. offsetLeft + iSpeed + 'px '; }}, 30);} scriptMobile