TS定义数组 ts声明函数

ts定义数组

  // 定义整数型数组
  const arr1: number[] = []
  const arr1_1: Array<number> = []

  // 定义字符窜型数组
  const arr2: string[] = []
  const arr2_1: Array<string> = []

  // 定义对象型数组
  const arr3: object[] = []
  const arr3_1: Array<Object> = []
  const arr3_2: Array<{ title: string; show: boolean; num?: number }> = []

  // 定义任意类型数组
  const arr4: any[] = []
  const arr4_1: Array<any> = []
 
  //定义二维数组类型（n维数组类似）
  const arr5:Array<Array<any>> = []

如果类型比较多推荐使用接口去写

interface Config {
  name: string;
  value: string;
  icon: string;
  occupancy?: number;
  detail?: string;
}


//const configs: Config[] =[]

 const configs: Config[] = reactive([
    {
      name: '内存',
      value: '',
      icon: memoryIcon,
    },
    {
      name: 'CPU',
      value: '',
      icon: cpuIcon,
    },
    {
      name: 'GPU',
      value: '',
      icon: gpuIcon,
    },
    {
      name: '数据盘硬盘使用量',
      value: '',
      occupancy: 0,
      icon: diskIcon,
    },
  ]);

ts声明函数类型

// 语法一
function fn(param1:number,param2:string):string{
    if (param1 === 1){
        return param2
    }else {
        return "hello world"
    }
}

// 语法2
let fn2:(param1:number,param2:string) => string
fn2 = function(param1,param2){
    if (param1 === 1){
        return param2
    }else {
        return "hello world"
    }
}