Javascript Dynamic Properties
In javascript how to get properties by access instance properties?
<html>
<body>
</body>
<script>
function book (e){
this.x = e;
}
Object.defineProperties(book.prototype,{
_bookname:{
writable : true,
value : 'value'
},
bookname:{
get:function(){return 'book'+this.x;}
},
year:{
get: function(){
return 2019;
}
}
})
function shelf(b){
this.b = b;
}
shelf.prototype.get= {
book: function(){return b.bookname}
}
Object.defineProperties(shelf.prototype,{
bookname:{
get:function(){
return this.b.bookname+"shelf";
}
}
})
test = new book('fromheaven');
testshelf = new shelf (test);
console.log('book.bookname : ',book.bookname);
console.log("instace.property : ",test.x)
console.log('instance.definedProperty :',test.bookname);
console.log(testshelf.bookname)
console.log(test.year);
// console.log(book.year);
</script>
</html>