react中redux里面的reducer splice 不能用问题!~
Author:[email protected] Date:
react中redux里面的reducer splice 返回不生效。必须,slice()副本,再修改!
let tem=state.listArr; tem.splice(action.index,1);
千说万说,不如代码有效:
比如:
const reducer=(state=states,action)=>{ switch (action.type){ case 'add': console.log(state.listArr); return{ ...state, listArr:state.listArr.concat([state.value]) }; case 'del': let tem=state.listArr.slice(); tem.splice(action.index,1); return{ ...state, // listArr:[].concat(state.listArr.slice(0,action.index),state.listArr.slice(action.index,state.listArr.length)) listArr:tem }; case 'change': return{ ...state, value:action.obj.target.value }; default: return state; } };
转载本站文章《react中redux里面的reducer splice 不能用问题!~》,
请注明出处:https://www.zhoulujun.cn/html/webfront/ECMAScript/jsBase/2017_0315_7963.html