JavaScript to achieve progress bar effect

This article example shares the specific code of JavaScript to achieve the progress bar effect for your reference. The specific content is as follows

The effect picture this time is as follows:

This example is not difficult to do. When I practiced, the new knowledge point was to use the window.getComputedStyle() function to get the width value of the element.

The general idea is to initially put a div box with a width of 0 in a div box, and then use a timer in the button's onclick callback function to change its width value

The code is as follows:

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        #container {
            width: 500px;
            height: 200px;
            margin: 50px auto;
            position: relative;
        }

        #box {
            width: 260px;
            height: 30px;
            border: 1px pink solid;
            border-radius: 16px;
            margin-bottom: 20px;
            padding: 1px;
            overflow: hidden;
        }

        #cont {
            width: 0;
            height: 100%;
            background-color: pink;
            border-radius: 16px;
        }

        #btn {
            position: absolute;
            margin-left: 110px;
            width: 50px;
            height: 30px;
        }


        #text {
            display: block;
            position: relative;
            left: 120px;
            margin-bottom: 20px;
        }

    </style>
</head>

<body>
    <div id="container">
        <div id="box" data-content-before="22">
            <div id="cont"></div>
        </div>
        <div id="text">0%</div>
        <button id="btn">Submit</button>
    </div>
    <script>
        let box = document.getElementById("box");
        let btn = document.getElementById("btn");
        let cont = document.getElementById("cont");
        let text = document.getElementById("text");

        function getstyle(obj, name) {
            if (window.getComputedStyle) {
                return window.getComputedStyle(obj, null)[name];
            }
            else {
                return obj.currentStyle[name];
            }
        }

        btn.onclick = function () {
            let ini = 0;
            let num = setInterval(() => {

                let tem = parseInt(window.getComputedStyle(cont, null)["width"]);
                let now = tem + 26;

                if (tem >= 260) {
                    console.log(now);
                    clearInterval(num);
                    return;
                }
                
                cont.style.width = now + "px";
                ini = ini + 10;
                text.innerText = ini + "%";

            }, 80);
        }
    </script>

</body>

</html>

The above is the full content of this article. I hope it will be helpful for everyone’s study. I also hope that everyone will support 123WORDPRESS.COM.

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