Guideline image https://i.sstatic.net/nQks3.png
Is there a way to create blue dashed reference lines using CSS similar to the ones seen in Firefox's development tools?
Guideline image https://i.sstatic.net/nQks3.png
Is there a way to create blue dashed reference lines using CSS similar to the ones seen in Firefox's development tools?
I have successfully created a reference line using the following method: I calculate the parent div's top, left, width, and height variables and then apply them to lines.
<!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>
body {
margin: 0;
}
:root {
--left: 50px;
--top: 40px;
--width: 150px;
--height: 80px;
}
.mydiv {
width: var(--width);
height: var(--height);
left: var(--left);
top: var(--top);
position: relative;
background-color: black;
}
.up {
border-top: 1px dashed aqua;
height: 1px;
left: calc(0px - var(--left));
line-height: 1px;
width: 100vw;
}
.down {
border-top: 1px dashed aqua;
height: 1px;
left: calc(0px - var(--left));
top: var(--height);
width: 100vw;
}
.left {
border-left: 1px dashed aqua;
width: 1px;
top: calc(0px - var(--top));
height: 100vh;
}
.right {
border-left: 1px dashed aqua;
width: 1px;
top: calc(0px - var(--top));
left: var(--width);
height: 100vh;
}
.v-line {
position: absolute;
}
</style>
</head>
<body>
<div class="mydiv">
<span class="v-line up"></span>
<span class="v-line down"></span>
<span class="v-line left"></span>
<span class="v-line right"></span>
</div>
</body>
</html>If you have any other great ideas, please share your answer with us!
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