lodash常用函数

た入场券 2024-04-17 05:46 11阅读 0赞

### 深拷贝 ###

deepClone(source) { 
    		if (!source && typeof source !== 'object') { 
    			throw new Error('error arguments', 'shallowClone')
    		}
    		const targetObj = source.constructor === Array ? [] : { }
    		for (const keys in source) { 
    			if (source.hasOwnProperty(keys)) { 
    				if (source[keys] && typeof source[keys] === 'object') { 
    					targetObj[keys] = source[keys].constructor === Array ? [] : { }
    					targetObj[keys] = this.deepClone(source[keys])
    				} else { 
    					targetObj[keys] = source[keys]
    				}
    			}
    		}
    		return targetObj
    	}

### 防抖 ###

debounce(fn, delay) {
    		let timer;
    		return ()=>{
    			if(timer){
    				clearTimeout(timer)
    				timer=null
    			}
    			timer=setTimeout((...args)=>{
    				fn.call(this,args)
    			},delay)
    		}
    	}

### 日期 ###

//y-m-d
    	getDate() { 
    		const date = new Date();
    		let year = date.getFullYear();
    		let month = date.getMonth() + 1;
    		let day = date.getDate();
    		month = month.toString().padStart(2, '0')
    		day = day.toString().padStart(2, '0')
    		return `${ year}-${ month}-${ day}`;
    	}
      //h-m-s
    	getTime() { 
    		const date = new Date();
    		let hour = date.getHours().toString().padStart(2, '0');
    		let minute = date.getMinutes().toString().padStart(2, '0');
    		let second = date.getSeconds().toString().padStart(2, '0');
    		return `${ hour}:${ minute}:${ second}`;
    	}

### 判断是否是JSON字符串 ###

isJSONStr(str){ 
    			try{ 
    				if(JSON.parse(str) instanceof Object){ 
    					return true
    				}
    			}
    			catch(error){ 
    				console.log(error)
    				return false
    			}
    	}

### 判断空类型 ###

//判断是否是空对象{}
    	isEmptyObj(obj) { 
        return obj !== null && typeof obj === 'object' && !Array.isArray(obj)&& (Object.keys(obj).length === 0)
      }
    	//是否是空数组[]
    	isEmptyArr(Arr){ 
    		return Array.isArray(Arr)&&Arr.length===0
    	}
    	//是否是空，undefined,null,"",{},[]
    	isEmpty(value){ 
    		if(!value&&value!==0){ 
    			return true
    		}
        else{ 
    			if(Object.prototype.toString.call(value)==="[object Array]"){ 
    				return value.length===0
    			}
    			if(Object.prototype.toString.call(value)==="[object Object]"){ 
    				return Object.keys(value).length === 0
    			}
    		}
    		return false
    	}