Created
July 15, 2021 19:00
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// source https://jsbin.com
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <meta name="viewport" content="width=device-width"> | |
| <title>JS Bin</title> | |
| </head> | |
| <body> | |
| <script id="jsbin-javascript"> | |
| // function counter(state=0, action){ | |
| // if(action.type == "incr"){ | |
| // return state+1; | |
| // } else if (action.type == "decr") { | |
| // return state--; | |
| // } | |
| // // else if (action.type == "async_incr") { | |
| // // // effect | |
| // // return setTimeout(function(){ | |
| // // return state + 10; | |
| // // }, 3000); | |
| // // } | |
| // else { | |
| // return state; | |
| // } | |
| // } | |
| // const render = () =>{ | |
| // document.body.innerText = store.getState(); | |
| // } | |
| // // console.log(counter(0, {type: "incr"})) | |
| // const createStore = function(reducer){ | |
| // // state = data, app state | |
| // let state; | |
| // // subscribtions, observers | |
| // let listeners = []; | |
| // // queries | |
| // const getState = () => state; | |
| // // action/Event Dispatch, same thing | |
| // const dispatch = (action) => { | |
| // state = reducer(state, action); | |
| // listeners.forEach(listener => listener()); | |
| // return ()=> { | |
| // listeners = listeners.filter(l => l !== listener); | |
| // } | |
| // }; | |
| // dispatch({}); | |
| // // queries, | |
| // const subscribe = (listener) => { | |
| // listeners.push(listener); | |
| // } | |
| // return {getState, dispatch, subscribe}; | |
| // } | |
| // const store = createStore(counter); | |
| // // store.dispatch({type: "incr"}); | |
| // store.dispatch({type: "async_incr"}); | |
| // // redux thunk "covers" the reducer, dispatching events inside | |
| // // const rerenderandadd = () => { | |
| // // return setInterval(function(){ | |
| // // store.dispatch({type: "incr"}); | |
| // // }, 3000); | |
| // // } | |
| // store.subscribe(render); | |
| // // rerenderandadd(); | |
| // // setInterval(function(){ | |
| // // console.log(store.getState()) | |
| // // }, 1000); | |
| // render(); | |
| // reducer / dispatcher / event handler list | |
| // state = F(old-state, action) | |
| function counter(state=0, action){ | |
| if(action.type == "+"){ | |
| return state+1; | |
| } else if (action.type == "-") { | |
| return state--; | |
| } | |
| else { | |
| return state; | |
| } | |
| } | |
| const createStore = function(reducer){ | |
| // state = data, app state | |
| let state; | |
| // subscribtions, observers | |
| let listeners = []; | |
| // queries | |
| const getState = () => state; | |
| // action/Event Dispatch, same thing | |
| const dispatch = (action) => { | |
| state = reducer(state, action); | |
| listeners.forEach(listener => listener()); | |
| return ()=> { | |
| listeners = listeners.filter(l => l !== listener); | |
| } | |
| }; | |
| // queries, | |
| const subscribe = (listener) => { | |
| listeners.push(listener); | |
| } | |
| dispatch({}); | |
| return {getState, dispatch, subscribe}; | |
| } | |
| const store = createStore(counter); | |
| store.dispatch({type: "+"}); | |
| console.log(store.getState()) | |
| const render = () =>{ | |
| document.body.innerText = store.getState(); | |
| } | |
| store.subscribe(render); | |
| render(); | |
| store.dispatch({type: "async+"}); | |
| store.dispatch({type: "async+"}); | |
| // store.dispatch({type: "async_incr"}); | |
| // // redux thunk "covers" the reducer, dispatching events inside | |
| const rerenderandadd = () => { | |
| return setInterval(function(){ | |
| store.dispatch({type: "+"}); | |
| }, 3000); | |
| } | |
| rerenderandadd(); | |
| const state = { | |
| friends: [], | |
| burgers: [] | |
| } | |
| </script> | |
| <script id="jsbin-source-javascript" type="text/javascript"> | |
| // function counter(state=0, action){ | |
| // if(action.type == "incr"){ | |
| // return state+1; | |
| // } else if (action.type == "decr") { | |
| // return state--; | |
| // } | |
| // // else if (action.type == "async_incr") { | |
| // // // effect | |
| // // return setTimeout(function(){ | |
| // // return state + 10; | |
| // // }, 3000); | |
| // // } | |
| // else { | |
| // return state; | |
| // } | |
| // } | |
| // const render = () =>{ | |
| // document.body.innerText = store.getState(); | |
| // } | |
| // // console.log(counter(0, {type: "incr"})) | |
| // const createStore = function(reducer){ | |
| // // state = data, app state | |
| // let state; | |
| // // subscribtions, observers | |
| // let listeners = []; | |
| // // queries | |
| // const getState = () => state; | |
| // // action/Event Dispatch, same thing | |
| // const dispatch = (action) => { | |
| // state = reducer(state, action); | |
| // listeners.forEach(listener => listener()); | |
| // return ()=> { | |
| // listeners = listeners.filter(l => l !== listener); | |
| // } | |
| // }; | |
| // dispatch({}); | |
| // // queries, | |
| // const subscribe = (listener) => { | |
| // listeners.push(listener); | |
| // } | |
| // return {getState, dispatch, subscribe}; | |
| // } | |
| // const store = createStore(counter); | |
| // // store.dispatch({type: "incr"}); | |
| // store.dispatch({type: "async_incr"}); | |
| // // redux thunk "covers" the reducer, dispatching events inside | |
| // // const rerenderandadd = () => { | |
| // // return setInterval(function(){ | |
| // // store.dispatch({type: "incr"}); | |
| // // }, 3000); | |
| // // } | |
| // store.subscribe(render); | |
| // // rerenderandadd(); | |
| // // setInterval(function(){ | |
| // // console.log(store.getState()) | |
| // // }, 1000); | |
| // render(); | |
| // reducer / dispatcher / event handler list | |
| // state = F(old-state, action) | |
| function counter(state=0, action){ | |
| if(action.type == "+"){ | |
| return state+1; | |
| } else if (action.type == "-") { | |
| return state--; | |
| } | |
| else { | |
| return state; | |
| } | |
| } | |
| const createStore = function(reducer){ | |
| // state = data, app state | |
| let state; | |
| // subscribtions, observers | |
| let listeners = []; | |
| // queries | |
| const getState = () => state; | |
| // action/Event Dispatch, same thing | |
| const dispatch = (action) => { | |
| state = reducer(state, action); | |
| listeners.forEach(listener => listener()); | |
| return ()=> { | |
| listeners = listeners.filter(l => l !== listener); | |
| } | |
| }; | |
| // queries, | |
| const subscribe = (listener) => { | |
| listeners.push(listener); | |
| } | |
| dispatch({}); | |
| return {getState, dispatch, subscribe}; | |
| } | |
| const store = createStore(counter); | |
| store.dispatch({type: "+"}); | |
| console.log(store.getState()) | |
| const render = () =>{ | |
| document.body.innerText = store.getState(); | |
| } | |
| store.subscribe(render); | |
| render(); | |
| store.dispatch({type: "async+"}); | |
| store.dispatch({type: "async+"}); | |
| // store.dispatch({type: "async_incr"}); | |
| // // redux thunk "covers" the reducer, dispatching events inside | |
| const rerenderandadd = () => { | |
| return setInterval(function(){ | |
| store.dispatch({type: "+"}); | |
| }, 3000); | |
| } | |
| rerenderandadd(); | |
| const state = { | |
| friends: [], | |
| burgers: [] | |
| } | |
| </script></body> | |
| </html> |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| // function counter(state=0, action){ | |
| // if(action.type == "incr"){ | |
| // return state+1; | |
| // } else if (action.type == "decr") { | |
| // return state--; | |
| // } | |
| // // else if (action.type == "async_incr") { | |
| // // // effect | |
| // // return setTimeout(function(){ | |
| // // return state + 10; | |
| // // }, 3000); | |
| // // } | |
| // else { | |
| // return state; | |
| // } | |
| // } | |
| // const render = () =>{ | |
| // document.body.innerText = store.getState(); | |
| // } | |
| // // console.log(counter(0, {type: "incr"})) | |
| // const createStore = function(reducer){ | |
| // // state = data, app state | |
| // let state; | |
| // // subscribtions, observers | |
| // let listeners = []; | |
| // // queries | |
| // const getState = () => state; | |
| // // action/Event Dispatch, same thing | |
| // const dispatch = (action) => { | |
| // state = reducer(state, action); | |
| // listeners.forEach(listener => listener()); | |
| // return ()=> { | |
| // listeners = listeners.filter(l => l !== listener); | |
| // } | |
| // }; | |
| // dispatch({}); | |
| // // queries, | |
| // const subscribe = (listener) => { | |
| // listeners.push(listener); | |
| // } | |
| // return {getState, dispatch, subscribe}; | |
| // } | |
| // const store = createStore(counter); | |
| // // store.dispatch({type: "incr"}); | |
| // store.dispatch({type: "async_incr"}); | |
| // // redux thunk "covers" the reducer, dispatching events inside | |
| // // const rerenderandadd = () => { | |
| // // return setInterval(function(){ | |
| // // store.dispatch({type: "incr"}); | |
| // // }, 3000); | |
| // // } | |
| // store.subscribe(render); | |
| // // rerenderandadd(); | |
| // // setInterval(function(){ | |
| // // console.log(store.getState()) | |
| // // }, 1000); | |
| // render(); | |
| // reducer / dispatcher / event handler list | |
| // state = F(old-state, action) | |
| function counter(state=0, action){ | |
| if(action.type == "+"){ | |
| return state+1; | |
| } else if (action.type == "-") { | |
| return state--; | |
| } | |
| else { | |
| return state; | |
| } | |
| } | |
| const createStore = function(reducer){ | |
| // state = data, app state | |
| let state; | |
| // subscribtions, observers | |
| let listeners = []; | |
| // queries | |
| const getState = () => state; | |
| // action/Event Dispatch, same thing | |
| const dispatch = (action) => { | |
| state = reducer(state, action); | |
| listeners.forEach(listener => listener()); | |
| return ()=> { | |
| listeners = listeners.filter(l => l !== listener); | |
| } | |
| }; | |
| // queries, | |
| const subscribe = (listener) => { | |
| listeners.push(listener); | |
| } | |
| dispatch({}); | |
| return {getState, dispatch, subscribe}; | |
| } | |
| const store = createStore(counter); | |
| store.dispatch({type: "+"}); | |
| console.log(store.getState()) | |
| const render = () =>{ | |
| document.body.innerText = store.getState(); | |
| } | |
| store.subscribe(render); | |
| render(); | |
| store.dispatch({type: "async+"}); | |
| store.dispatch({type: "async+"}); | |
| // store.dispatch({type: "async_incr"}); | |
| // // redux thunk "covers" the reducer, dispatching events inside | |
| const rerenderandadd = () => { | |
| return setInterval(function(){ | |
| store.dispatch({type: "+"}); | |
| }, 3000); | |
| } | |
| rerenderandadd(); | |
| const state = { | |
| friends: [], | |
| burgers: [] | |
| } |
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