bc518174
 王天杨
提交两个项目文件
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import memoize from 'lodash/memoize';
/**
* This is memoized because the viewBox is unlikely to change often
* - but because it is computed from offset, any change to it would re-render all children.
*
* And because we have many readers of the viewBox, and update it only rarely,
* then let's optimize with memoization.
*/
export var calculateViewBox = memoize(function (offset) {
return {
x: offset.left,
y: offset.top,
width: offset.width,
height: offset.height
};
}, function (offset) {
return ['l', offset.left, 't', offset.top, 'w', offset.width, 'h', offset.height].join('');
});
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