Animation effect of number change based on JQuery-can be used as a counter

Because the requirement is dynamic, I thought about the change of position. I thought of the JQuery I had used before, tried all the effects in it, and finally chose animate customization. The code is as follows:
Copy code The code is as follows:
 
 
 
testAnimate< /title> <br><script type="text/javascript"> <br>function changeNum(n) { //Set n to the number you want to change it to<br>$(function () { <br> $("counter").animate({ top: ' =20px', opacity: '0' }, "slow", function () { //Let the number move downward and disappear. Top is the distance between the element and the top of the web page. Opacity is transparency, the value is 0~1 <br>document.getElementById("counter").innerHTML = n; //When the number disappears, it changes to n. There is a span element with the id of counter in the web page. This code must Put it inside animate, otherwise its value will change before the number disappears <br>}) <br>.animate({ top: '-=40px' }, "slow") //Number n jumps to above the original position <br>.animate({ top: ' =20px', opacity: '1' }, "slow"); //The number n appears and falls to the original position of the number. When the opacity is 0, the object is completely transparent or disappears. When the value is 1, it is fully displayed <br>}); <br>} <br></script> <br></head> <br><body> <br><span id="counter ">1</span> <br></body> <br></html> Write down your thoughts. It’s my first time using Blog Park and I don’t know how to use it. Please correct me if there are any mistakes. Thank you <br>
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