How to use pure CSS to achieve the effect of a pair of scissors (source code attached)

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Effect preview

Source code download

https://github.com/comehope/front- end-daily-challenges

Code Interpretation

Define dom, the container contains 2 .half elements, each representing half of the scissors, its sub-element handle represents the handle, and blade represents the knife. The last .joint represents the rivet connecting the left and right parts:

<figure>
    <div>
        <span></span>
        <span></span>
    </div>
    <div>
        <span></span>
        <span></span>
    </div>
    <div></div>
</figure>

Centered display:

body {
    margin: 0;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

Defines the container size, where outline is the auxiliary line:

.scissors {
    width: 21em;
    height: 7em;
    outline: 1px dashed;
}

Define the size of the half scissors, where outline is the auxiliary line:

.scissors {
    position: relative;
}

.half {
    position: absolute;
    width: inherit;
    height: 4em;
    outline: 1px dashed red;
}

Draw the handle:

.handle {
    position: absolute;
    box-sizing: border-box;
    width: 8em;
    height: inherit;
    border: 1em solid #333;
    border-radius: 2em;
}

Draw the knife, and use the fillet attribute to draw the top The tip of the knife:

.blade {
    position: absolute;
    width: 15em;
    height: 1em;
    background-color: silver;
    top: 3em;
    left: 6em;
    border-radius: 0 0 1em 0;
    z-index: -1;
}

Use pseudo elements to draw a triangle on the bottom of the knife to make the knife and the handle more firmly connected:

.blade::before {
    content: '';
    position: absolute;
    border-style: solid;
    border-width: 0 1.8em 1em 1.8em;
    border-color: transparent transparent silver transparent;
    top: -1em;
    left: 0.2em;
}

Make half of the knife tilted:

.half {
    transform-origin: 45% bottom;
    transform: rotate(15deg);
}

Use the scale() function to draw the other half of the scissors:

.half {
    transform-origin: 45% bottom;
    transform: rotate(calc(15deg * var(--direction))) scaleY(var(--direction));
}

.half:nth-child(1) {
    --direction: 1;
    top: 0;
}

.half:nth-child(2) {
    --direction: -1;
    top: -1em;
}

Draw the rivets connecting the left and right halves:

.joint {
    position: absolute;
    width: 0.7em;
    height: 0.7em;
    background-color: #333;
    border-radius: 50%;
    top: calc(50% - 0.7em / 2);
    left: 45%;
}

Increase the animation effect when the mouse is hovering :

.scissors:hover .half {
    animation: cut 2s ease-out;
}

@keyframes cut {
    20%, 60% {
        transform: rotate(calc(30deg * var(--direction))) scaleY(var(--direction));
    }

    40%, 80% {
        transform: rotate(calc(5deg * var(--direction))) scaleY(var(--direction));
    }
}

Finally, don’t forget to delete the auxiliary lines.

Done!

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