Function isPrimitive

vue.js:50–59

* Check if value is primitive * //判断数据类型是否是string，number，symbol，boolean

(value)

     *  //判断数据类型是否是string，number，symbol，boolean
     */
    function isPrimitive(value) {
        //判断数据类型是否是string，number，symbol，boolean
        return (
            typeof value === 'string' ||
            typeof value === 'number' ||
            // $flow-disable-line
            typeof value === 'symbol' ||
            typeof value === 'boolean'
        )
    }

    /**
     * Quick object check - this is primarily used to tell