javascript - What method can be used to draw the strip of light in the red box in the picture?

Question

In the project, I was asked to draw the strip of light in the red box as shown in the figure. I tried some methods but couldn't fully realize it, especially the tail parts at both ends. Of course, I also know that converting img to css is the fastest, but The converted code was so large that it was rejected. So I am very curious, is there really a CSS or canvas method to achieve it?

伊谢尔伦 · Answer

canvas, draw the picture directly

大家讲道理 · Answer

You can also use css gradients

p {
            width: 600px;
            height: 150px;
            border: 1px solid #666;
            line-height: 150px;
            text-align: center;
            font-weight: 900;
            font-size: 30px;
            color: #fff;
            margin: 10px auto;
        }
        .toLeft {
            background-image:-webkit-linear-gradient(
            to left, 
            rgba(255,0,0,0) 0%, 
            rgba(255,0,0,0.8) 7%, 
            rgba(255,0,0,1) 11%, 
            rgba(255,0,0,1) 12%, 
            rgba(255,252,0,1) 28%, 
            rgba(1,180,7,1) 45%, 
            rgba(0,234,255,1) 60%, 
            rgba(0,3,144,1) 75%, 
            rgba(255,0,198,1) 88%, 
            rgba(255,0,198,0.8) 93%, 
            rgba(255,0,198,0) 100%); 
            background-image:linear-gradient(
            to left, 
            rgba(255,0,0,0) 0%, 
            rgba(255,0,0,0.8) 7%, 
            rgba(255,0,0,1) 11%, 
            rgba(255,0,0,1) 12%, 
            rgba(255,252,0,1) 28%, 
            rgba(1,180,7,1) 45%, 
            rgba(0,234,255,1) 60%, 
            rgba(0,3,144,1) 75%, 
            rgba(255,0,198,1) 88%, 
            rgba(255,0,198,0.8) 93%, 
            rgba(255,0,198,0) 100%); 
        }

        .toRight {
            background-image:-webkit-linear-gradient(
            to right, 
            rgba(255,0,0,0) 0%, 
            rgba(255,0,0,0.8) 7%, 
            rgba(255,0,0,1) 11%, 
            rgba(255,0,0,1) 12%, 
            rgba(255,252,0,1) 28%, 
            rgba(1,180,7,1) 45%, 
            rgba(0,234,255,1) 60%, 
            rgba(0,3,144,1) 75%, 
            rgba(255,0,198,1) 88%, 
            rgba(255,0,198,0.8) 93%, 
            rgba(255,0,198,0) 100%);
            background-image: linear-gradient(
            to right, 
            rgba(255,0,0,0) 0%, 
            rgba(255,0,0,0.8) 7%, 
            rgba(255,0,0,1) 11%, 
            rgba(255,0,0,1) 12%, 
            rgba(255,252,0,1) 28%, 
            rgba(1,180,7,1) 45%, 
            rgba(0,234,255,1) 60%, 
            rgba(0,3,144,1) 75%, 
            rgba(255,0,198,1) 88%, 
            rgba(255,0,198,0.8) 93%, 
            rgba(255,0,198,0) 100%);
        
        }

It is recommended that you read: ww.w3cplus.com/css3/new-css3-linear-gradient.html