How to operate the check box in HTML page

Checkboxes are very common on web pages. Whether it is an e-commerce website or a platform, you will see checkboxes wherever there is a need to make a selection. Next, here are two small demos I wrote before, both about checkboxes, I hope they will be helpful to you.

The first one is about the operation of selecting and deselecting all checkboxes. Of course, I also added a small function in it, that is, when the checkboxes of the selected products or other things below are all selected, the select all button will also become selected; vice versa.

 <!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title></title>
        <style>
            td{
                border: 1px solid black;
                text-align: center;
            }
            table{
                border: 1px solid black;
            }
            #opp{
                border-radius: 50%;
                width: 20px;
                height: 20px;
                border: 1px style #eee;
                outline-style: none;
            }
        </style>
    </head>
    <body>
        <table>
            <tr>
                <td><input id="all" type="checkbox">Select All</td>
                <td width="300px">Checkbox Select All Example</td>
            </tr>
            <tr>
                <td><input class="list" type="checkbox"></td>
                <td></td>
            </tr>
            <tr>
                <td><input class="list" type="checkbox"></td>
                <td></td>
            </tr>
            <tr>
                <td><input class="list" type="checkbox"></td>
                <td></td>
            </tr>
            <tr>
                <td><input class="list" type="checkbox"></td>
                <td></td>
            </tr>
            <tr>
                <td><input class="list" type="checkbox"></td>
                <td></td>
            </tr>
            <tr>
                <td><input class="list" type="checkbox"></td>
                <td></td>
            </tr>
            <tr>
                <td><input class="list" type="checkbox"></td>
                <td></td>
            </tr>
            <tr>
                <td><input id="opp" type="button">Invert selection</td>
                <td></td>
            </tr>
        </table>
        <script>
                var vll = document.getElementById("all");
                var vlist = document.getElementsByClassName("list");
                var vopp = document.getElementById("opp");
                vll.onclick=function(){ 
                    for(var i=0;i<vlist.length;i++){    
                        vlist[i].checked=vll.checked;
                    }
                }
                for( var i=0;i<vlist.length;i++){
                    vlist[i].onclick=function(){
                        if(this.checked==false){
                            vll.checked=false;  
                            }
                        else{
                            for(var i2=0;i2<vlist.length;i2++){ 
                                if(vlist[i2].checked==false){
                                    break;
                                }
                                if(i2>=vlist.length-1){
                                    vll.checked=true;   
                                }
                            }
                        }
                    }   
                }
                vopp.onclick=function(){
                    for(var i=0;i<vlist.length;i++){
                    vlist[i].checked=!vlist[i].checked;
                        if(vlist[i].checked==false){
                            vll.checked=false;
                        }
                    }
                }
        </script>
    </body>
</html>

The second one is to customize the checkbox style, which is to replace our checkbox with an image to add a cool effect; and here I completely use CSS3 writing, without involving JavaScript;

 <!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title></title>
        <style>
            .box1{
                width: 1000px;
                height: 50px;
                position: relative;
            }
            input{
                width: 50px;
                height: 50px;
                opacity: 1;
                display: none;
            }
            input+label{
                display: block;
                width: 50px;
                height: 50px;
                background: url(img/2.png);
                background-size: 100%;
            }
            input:checked+label{
                background: url(img/1.PNG);
                background-size: 100%;
            }
        </style>
    </head>
    <body>
        <div class="box1">
            <input type="checkbox" name="" id="input1" value="" />
            <label for="input1"></label>
        </div>
        <div class="box2">
            <input type="checkbox" name="" id="input2" value="" />
            <label for="input2"></label>
        </div>
        <div class="box3">
            <input type="checkbox" name="" id="input3" value="" />
            <label for="input3"></label>
        </div>
    </body>
</html>

The above is the operation method of check boxes in HTML pages introduced by the editor. I hope it will be helpful to everyone. If you have any questions, please leave me a message and the editor will reply to you in time. I would also like to thank everyone for their support of the 123WORDPRESS.COM website!

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