Function addVal

component/CheckBoxGroup.js:30–44

(val)

    },

    addVal(val){
        let flag = false;
        const {value} = this.state;
        for (let i = 0; i < value.length; i++) {
            if (val === value[i]){
                flag = true;
                break;
            }
        }
        if (!flag) {
            this.setState({
                value: value.concat(val) 
            }, this.valueChange);
        }
    },

    removeVal(val){
        let index = this.state.value.indexOf(val);