How to customize right click with javascript?
Tags: webdev, javascript, beginners, tutorial
Published: 2022-02-01 03:08:17

Have you used web apps that doesn't show default browser thingy when you 

 right click,rather a custom pop up or menu where you clicked?
well you can do that with vanilla js.
so basically the structure is we attach a 'context menu' event listener to the whole document for global click and to a div for local right click.
You can even customize it with vanilla css.
so our HTML is:
```
<div class="position">
    <div class="container" align="center">
        <table style="text-align: left; width: 99%; margin-left: auto; margin-right: auto;" border="0" cellpadding="2" cellspacing="2">
            <tbody>
                <tr>
                    <td style="vertical-align: middle; text-align: center;">Option 1<br>
                    </td>
                </tr>
                <tr>
                    <td style="vertical-align: middle; text-align: center;">Option 2<br>
                    </td>
                </tr>
                <tr>
                    <td style="vertical-align: middle; text-align: center;">Option 3<br>
                    </td>
                </tr>
                <tr>
                    <td style="vertical-align: middle; text-align: center;">Option 4<br>
                    </td>
                </tr>
                <tr>
                    <td style="vertical-align: middle; text-align: center;">Option 5<br>
                    </td>
                </tr>
            </tbody>
        </table>
    </div>
</div>
```
css:
```
.position {
    position: absolute;
    width: 1px;
    height: 1px;
    z-index: 2;
    display: none;
}

.container {
    width: 220px;
    height: auto;
    border: 1px solid black;
    background: rgb(245, 243, 243);
}

.container p {
    height: 30px;
    font-size: 18px;
    font-family: arial;
    width: 99%;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    background: rgb(245, 243, 243);
    color: black;
    transition: 0.2s;
}

.container p:hover {
    background: lightblue;
}

td {
    font-family: arial;
    font-size: 20px;
}

td:hover {
    background: lightblue;
    transition: 0.2s;
    cursor: pointer;
}
```
js:
```
var cls = true;
var ops;

window.onload = function() {
    document.querySelector(".container").addEventListener("mouseenter", function() {
        cls = false;
    });
    document.querySelector(".container").addEventListener("mouseleave", function() {
        cls = true;
    });
    ops = document.querySelectorAll(".container td");
    for (let i = 0; i < ops.length; i++) {
        ops[i].addEventListener("click", function() {
            document.querySelector(".position").style.display = "none";
        });
    }

    ops[0].addEventListener("click", function() {
        setTimeout(function() {
            /* YOUR FUNCTION */
            alert("Alert 1!");
        }, 50);
    });

    ops[1].addEventListener("click", function() {
        setTimeout(function() {
            /* YOUR FUNCTION */
            alert("Alert 2!");
        }, 50);
    });

    ops[2].addEventListener("click", function() {
        setTimeout(function() {
            /* YOUR FUNCTION */
            alert("Alert 3!");
        }, 50);
    });

    ops[3].addEventListener("click", function() {
        setTimeout(function() {
            /* YOUR FUNCTION */
            alert("Alert 4!");
        }, 50);
    });

    ops[4].addEventListener("click", function() {
        setTimeout(function() {
            /* YOUR FUNCTION */
            alert("Alert 5!");
        }, 50);
    });
}

document.addEventListener("contextmenu", function() {
    var e = window.event;
    e.preventDefault();
    document.querySelector(".container").style.padding = "0px";

   var x = e.clientX;
    var y = e.clientY;

    var docX = window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth || document.body.offsetWidth;
    var docY = window.innerHeight || document.documentElement.clientHeight || document.body.clientHeight || document.body.offsetHeight;

   var border = parseInt(getComputedStyle(document.querySelector(".container"), null).getPropertyValue('border-width'));

    var objX = parseInt(getComputedStyle(document.querySelector(".container"), null).getPropertyValue('width')) + 2;
    var objY = parseInt(getComputedStyle(document.querySelector(".container"), null).getPropertyValue('height')) + 2;

    if (x + objX > docX) {
        let diff = (x + objX) - docX;
        x -= diff + border;
    }

    if (y + objY > docY) {
        let diff = (y + objY) - docY;
        y -= diff + border;
    }

    document.querySelector(".position").style.display = "block";


    document.querySelector(".position").style.top = y + "px";
    document.querySelector(".position").style.left = x + "px";
});

window.addEventListener("resize", function() {
    document.querySelector(".position").style.display = "none";
});

document.addEventListener("click", function() {
    if (cls) {
      document.querySelector(".position").style.display = "none";
    }
});

document.addEventListener("wheel", function() {
    if (cls) {
        document.querySelector(".position").style.display= "none";
      static = false;
    }
});
```
and done!
see working demo here: [Demo](https://stackoverflow.com/questions/4909167/how-to-add-a-custom-right-click-menu-to-a-webpage)