37 lines
1.1 KiB
JavaScript
37 lines
1.1 KiB
JavaScript
/* istanbul ignore file */
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import * as React from 'react';
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function useRenderTimes(props, debug) {
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// Render times
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const timesRef = React.useRef(0);
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timesRef.current += 1;
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// Props changed
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const propsRef = React.useRef(props);
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const keys = [];
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Object.keys(props || {}).map(key => {
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if (props?.[key] !== propsRef.current?.[key]) {
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keys.push(key);
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}
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});
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propsRef.current = props;
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// Cache keys since React rerender may cause it lost
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const keysRef = React.useRef([]);
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if (keys.length) {
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keysRef.current = keys;
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}
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React.useDebugValue(timesRef.current);
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React.useDebugValue(keysRef.current.join(', '));
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if (debug) {
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console.log(`${debug}:`, timesRef.current, keysRef.current);
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}
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return timesRef.current;
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}
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export default process.env.NODE_ENV !== 'production' ? useRenderTimes : () => {};
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export const RenderBlock = /*#__PURE__*/React.memo(() => {
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const times = useRenderTimes();
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return /*#__PURE__*/React.createElement("h1", null, "Render Times: ", times);
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});
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if (process.env.NODE_ENV !== 'production') {
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RenderBlock.displayName = 'RenderBlock';
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} |