JavaScript weakMap.set() 方法

下面是weakMap.set()方法的例子。

• 例子：

   
      function gfg() { 
      const weakmap1 = new WeakMap();
    
      const key1 = {};
      const key2 = {};
      const key3 = {};
    
      weakmap1.set(key1, 'G');
      weakmap1.set(key2, 'F');
      weakmap1.set(key3, 'G');
    
     document.write(weakmap1.get(key1) 
                   +weakmap1.get(key2)
                   +weakmap1.get(key3));
      } 
      gfg(); 
   

• 输出：

  GFG

weakMap.set()是 JavaScript 中的一个内置函数，用于将具有特定键和值的新元素设置为 WeakMap 对象。

句法：

weakMap.set(key, value);

参数：参数“key”是要设置到 WeakMap 对象的元素的键，参数“value”是要设置到 WeakMap 对象的元素的值。

返回值：返回WeakMap对象。

例子：

Input: weakmap1.get(key1)
Output: GeeksForGeeks

JavaScript 代码来显示这个函数的工作：
代码#1：

 
  
    // creating WeakMap() object
    const weakmap1 = new WeakMap();
      
    // Creating some keys
    const key1 = {};
    const key2 = {};
  
    // Setting key and value to the object.
    weakmap1.set(key1, 'GeeksForGeeks');
    weakmap1.set(key2, 'gfg');
  
   // Returning the set values
   document.write(weakmap1.get(key1) +"<br>");
   document.write(weakmap1.get(key2));
  

输出：

GeeksForGeeks
gfg

代码#2：

 
  
    // creating WeakMap() object
    const weakmap1 = new WeakMap();
      
    // Creating some keys
    const key1 = {};
    const key2 = {};
    const key3 = {};
    const key4 = {};
    const key5 = {};
    const key6 = {};
  
    // Setting key and value to the object.
    weakmap1.set(key1, 'GeeksForGeeks');
    weakmap1.set(key2, 'gfg');
    weakmap1.set(key3, 'GfG is a cse portal');
    weakmap1.set(key4, '12345');
    weakmap1.set(key5, '@#$%');
    weakmap1.set(key6, '1.34');
  
   // Returning the set values
   document.write(weakmap1.get(key1) +"<br>");
   document.write(weakmap1.get(key2) +"<br>");
   document.write(weakmap1.get(key3) +"<br>");
   document.write(weakmap1.get(key4) +"<br>");
   document.write(weakmap1.get(key5) +"<br>");
   document.write(weakmap1.get(key6));
  

输出：

GeeksForGeeks
gfg
GfG is a cse portal
12345
@#$%
1.34

支持的浏览器：

• 谷歌浏览器 36 及更高版本
• Edge 12 及以上
• 火狐 6 及以上
• Internet Explorer 11 及更高版本
• Opera 23 及以上
• Safari 8 及更高版本