24 lines
598 B
JavaScript
24 lines
598 B
JavaScript
// We need to pass an argument as `{ theme }` for PigmentCSS, but we don't want to
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// allocate more objects.
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const arg = {
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theme: undefined
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};
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/**
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* Memoize style function on theme.
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* Intended to be used in styled() calls that only need access to the theme.
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*/
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export default function memoTheme(styleFn) {
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let lastValue;
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let lastTheme;
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return props => {
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let value = lastValue;
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if (value === undefined || props.theme !== lastTheme) {
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arg.theme = props.theme;
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value = styleFn(arg);
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lastValue = value;
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lastTheme = props.theme;
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}
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return value;
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};
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} |