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svgo/plugins/removeViewBox.js
Bogdan Chadkin 07f8d606e0
Implement preset-default plugin (#1513)
I saw complaints about `extendDefaultPlugins` api

- it cannot be used when svgo is installed globally
- it requires svgo to be installed when using svgo-loader or svgo-jsx
- it prevents using serializable config formats like json

In this diff I introduced the new plugin which is a bundle of all
default plugins.

```js
module.exports = {
  plugins: [
    'preset_default',
    // or
    {
      name: 'preset_default',
      floatPrecision: 4,
      overrides: {
        convertPathData: {
          applyTransforms: false
        }
      }
    }
  ]
}
```
2021-08-13 19:07:08 +03:00

55 lines
1.3 KiB
JavaScript

'use strict';
const { closestByName } = require('../lib/xast.js');
exports.name = 'removeViewBox';
exports.type = 'perItem';
exports.active = true;
exports.description = 'removes viewBox attribute when possible';
const viewBoxElems = ['svg', 'pattern', 'symbol'];
/**
* Remove viewBox attr which coincides with a width/height box.
*
* @see https://www.w3.org/TR/SVG11/coords.html#ViewBoxAttribute
*
* @example
* <svg width="100" height="50" viewBox="0 0 100 50">
* ⬇
* <svg width="100" height="50">
*
* @param {Object} item current iteration item
* @return {Boolean} if false, item will be filtered out
*
* @author Kir Belevich
*/
exports.fn = function (item) {
if (
item.type === 'element' &&
viewBoxElems.includes(item.name) &&
item.attributes.viewBox != null &&
item.attributes.width != null &&
item.attributes.height != null
) {
// TODO remove width/height for such case instead
if (item.name === 'svg' && closestByName(item.parentNode, 'svg')) {
return;
}
const nums = item.attributes.viewBox.split(/[ ,]+/g);
if (
nums[0] === '0' &&
nums[1] === '0' &&
item.attributes.width.replace(/px$/, '') === nums[2] && // could use parseFloat too
item.attributes.height.replace(/px$/, '') === nums[3]
) {
delete item.attributes.viewBox;
}
}
};