Press n or j to go to the next uncovered block, b, p or k for the previous block.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 | 1x 1x 4x 1x 1x 1x 3x 8x 1x 1x 8x 6x 6x 6x 1x 6x 2x 2x 1x 4x 7x 1x 5x | import React from 'react';
import produce from 'immer';
import equal from 'fast-deep-equal';
function createSubscribe() {
const listener = [];
const listen = updator => {
listener.push(updator);
};
const unListen = l => {
listener.splice(listener.indexOf(l), 1);
};
const update = updator => {
for (let i = 0; i < listener.length; i++) {
listener[i](updator);
}
};
return {listen, unListen, update};
}
export function init(store) {
const {listen, unListen, update} = createSubscribe();
class Provider extends React.PureComponent {
state = store;
reRender = updator => {
if (typeof updator === 'function') {
const newState = produce(this.state, draft => {
updator(draft);
});
if (!equal(newState, this.state)) {
this.setState(newState);
}
return;
}
Eif (!equal(updator, this.state)) {
this.setState(updator);
}
};
componentWillUnmount() {
unListen(this.reRender);
}
componentDidMount() {
listen(this.reRender);
}
render() {
return this.props.children(this.state);
}
}
return {
Ctx: fn => <Provider>{fn}</Provider>,
Put: update,
};
}
|