TypeScript Property ‘xx’ does not exist on type ‘Function’ TypeScript Property ‘xx’ does not exist on type ‘Function’

• inJavascriptTo obtain an object attribute or method, use the dot or parenthesis method, for example:

const obj = {
	a: 'a'
}
obj.a // 'a'
obj.b // undefined
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• But in theTypescriptIn, sometimes prompt likeProperty 'value' does not exist on type 'Object' This is becauseTypescriptNo properties are defined in this object when code checks are performed
• Solution:
  • Sets the object type toany, such as:

  const obj:any = {
      a: 'a'
  }
  obj.b = 'b'
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  • Define attributes that an object has through an interface, for example:

    const obj:ValueObject = {
       a: 'a'} interface ValueObject { value? : string } obj.b ='b'
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  • Enforce using assertions

   const obj = {
      a: 'a'
   }
  (obj as any).b = 'b'
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