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{"version":3,"file":"compat.module.js","sources":["../src/util.js","../src/PureComponent.js","../src/memo.js","../src/forwardRef.js","../src/Children.js","../src/suspense.js","../src/suspense-list.js","../../src/constants.js","../src/portals.js","../src/render.js","../src/index.js"],"sourcesContent":["/**\n * Assign properties from `props` to `obj`\n * @template O, P The obj and props types\n * @param {O} obj The object to copy properties to\n * @param {P} props The object to copy properties from\n * @returns {O & P}\n */\nexport function assign(obj, props) {\n\tfor (let i in props) obj[i] = props[i];\n\treturn /** @type {O & P} */ (obj);\n}\n\n/**\n * Check if two objects have a different shape\n * @param {object} a\n * @param {object} b\n * @returns {boolean}\n */\nexport function shallowDiffers(a, b) {\n\tfor (let i in a) if (i !== '__source' && !(i in b)) return true;\n\tfor (let i in b) if (i !== '__source' && a[i] !== b[i]) return true;\n\treturn false;\n}\n\n/**\n * Check if two values are the same value\n * @param {*} x\n * @param {*} y\n * @returns {boolean}\n */\nexport function is(x, y) {\n\treturn (x === y && (x !== 0 || 1 / x === 1 / y)) || (x !== x && y !== y);\n}\n","import { Component } from 'preact';\nimport { shallowDiffers } from './util';\n\n/**\n * Component class with a predefined `shouldComponentUpdate` implementation\n */\nexport function PureComponent(p, c) {\n\tthis.props = p;\n\tthis.context = c;\n}\nPureComponent.prototype = new Component();\n// Some third-party libraries check if this property is present\nPureComponent.prototype.isPureReactComponent = true;\nPureComponent.prototype.shouldComponentUpdate = function (props, state) {\n\treturn shallowDiffers(this.props, props) || shallowDiffers(this.state, state);\n};\n","import { createElement } from 'preact';\nimport { shallowDiffers } from './util';\n\n/**\n * Memoize a component, so that it only updates when the props actually have\n * changed. This was previously known as `React.pure`.\n * @param {import('./internal').FunctionComponent} c functional component\n * @param {(prev: object, next: object) => boolean} [comparer] Custom equality function\n * @returns {import('./internal').FunctionComponent}\n */\nexport function memo(c, comparer) {\n\tfunction shouldUpdate(nextProps) {\n\t\tlet ref = this.props.ref;\n\t\tlet updateRef = ref == nextProps.ref;\n\t\tif (!updateRef && ref) {\n\t\t\tref.call ? ref(null) : (ref.current = null);\n\t\t}\n\n\t\tif (!comparer) {\n\t\t\treturn shallowDiffers(this.props, nextProps);\n\t\t}\n\n\t\treturn !comparer(this.props, nextProps) || !updateRef;\n\t}\n\n\tfunction Memoed(props) {\n\t\tthis.shouldComponentUpdate = shouldUpdate;\n\t\treturn createElement(c, props);\n\t}\n\tMemoed.displayName = 'Memo(' + (c.displayName || c.name) + ')';\n\tMemoed.prototype.isReactComponent = true;\n\tMemoed._forwarded = true;\n\treturn Memoed;\n}\n","import { options } from 'preact';\n\nlet oldDiffHook = options._diff;\noptions._diff = vnode => {\n\tif (vnode.type && vnode.type._forwarded && vnode.ref) {\n\t\tvnode.props.ref = vnode.ref;\n\t\tvnode.ref = null;\n\t}\n\tif (oldDiffHook) oldDiffHook(vnode);\n};\n\nexport const REACT_FORWARD_SYMBOL =\n\t(typeof Symbol != 'undefined' &&\n\t\tSymbol.for &&\n\t\tSymbol.for('react.forward_ref')) ||\n\t0xf47;\n\n/**\n * Pass ref down to a child. This is mainly used in libraries with HOCs that\n * wrap components. Using `forwardRef` there is an easy way to get a reference\n * of the wrapped component instead of one of the wrapper itself.\n * @param {import('./index').ForwardFn} fn\n * @returns {import('./internal').FunctionComponent}\n */\nexport function forwardRef(fn) {\n\tfunction Forwarded(props) {\n\t\tif (!('ref' in props)) return fn(props, null);\n\n\t\tlet ref = props.ref;\n\t\tdelete props.ref;\n\t\tconst result = fn(props, ref);\n\t\tprops.ref = ref;\n\t\treturn result;\n\t}\n\n\t// mobx-react checks for this being present\n\tForwarded.$$typeof = REACT_FORWARD_SYMBOL;\n\t// mobx-react heavily relies on implementation details.\n\t// It expects an object here with a `render`
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