Why this code below, the console output of B type object instance of B, but is considered to be A type? Please answer
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Inheritance of four patterns & lt;/title> <br/><meta charset="utf-8" & gt; <br/></head> <br/><body> <br/><The script type="text/javascript" & gt; <br/>Function A () {} <br/>Var a=new a (); <br/>P. rototype=a; <br/>The function B () {} <br/>Var b=new b (); <br/>C.p rototype=b; <br/>The function C () {} <br/>The console. The log (b);//A {} why console output is regarded as A type b? <br/></script> <br/></body> <br/></html> </pre><p class="article - content rp"> CodePudding user response: </p>Because of fn prototype object point to the A B ah! <br/>If you want to make the output of the b is {b}, you can use the following code, modify the prototype of the b, pointing to A prototype, and stipulates the consructor <br/>P. rototype=Object. The create (Amy polumbo rototype, {constructor: {value: A}}); <br/><p class="article - content rp"> CodePudding user response: </p>Thank you, it is so! </div>
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