Box Model Inspector

Devtools style dom node inspector. Highlights the CSS box model just like chrome devtools. Draws a box around a given element highlighting width, height, margin, border & padding.

Demo: http://a-axton.github.io/box-model-inspector/

Caveats

• Expects box-sizing border-box
• Doesn't work well with fixed position elements. It highlights properly but won't stay in the proper position when scrolling.

Installation

npm

npm install box-model-inspector --save

inline

<script type="text/javascript" src="/path/dist/box-model-inspector.js"></script>

Theming

* { box-sizing: border-box; }

/* CONTENT */
.box-model .content {
  background: rgba(109, 238, 245, 0.5);
}

/* MARGIN */
.box-model .margin {}
.box-model .marginTop {}
.box-model .marginRight {}
.box-model .marginBottom {}
.box-model .marginLeft {}
.box-model .margin div {
  background: rgba(251, 176, 91, 0.65);
}

/* PADDING */
.box-model .padding {}
.box-model .paddingTop {}
.box-model .paddingRight {}
.box-model .paddingBottom {}
.box-model .paddingLeft {}
.box-model .padding div {
  background: rgba(139, 234, 127, 0.65);
}

/* BORDER */
.box-model .border {}
.box-model .borderTop {}
.box-model .borderRight {}
.box-model .borderBottom {}
.box-model .borderLeft {}
.box-model .border div {
  background-color: rgba(234, 228, 105, .8);
}

Sample Usage

var BoxModelInspector = require('box-model-inspector');

// all options are optional
var boxModelInspector = new BoxModelInspector({
  // initial element to highlight
  el: document.querySelectorAll('.example')[0],
  // custom class, defaults to 'box-model'
  className: 'box-model',
  // will append to element, uses body as default
  appendTo: document.body
});

// set new element to be highlighted
document.body.addEventListener('mousemove', function(e) {
  boxModelInspector.setElement(e.target);
  e.stopPropagation();
});

// refresh dimensions
window.addEventListener('resize', function() {
  boxModelInspector.refresh();
});

Methods

setElement

---

Set new element to highlight

Example

var el = document.getElementById('el');
boxModelInspector.setElement(el);

refresh

---

Refresh current element's box model

Example

window.addEventListener('resize', function() {
  boxModelInspector.refresh();
});

hide

---

Hide it

Example

boxModelInspector.hide();

show

---

Show it

Example

boxModelInspector.show();