constructor is a function
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4.5constructor/index.html
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4.5constructor/index.html
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<!DOCTYPE html>
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<html>
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<head>
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<!-- add mocha css, to show results -->
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<script>
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// chai has a lot of stuff, let's make assert global
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</script>
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</head>
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<body>
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<!-- the script with tests (describe, it...) -->
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<!-- <script src="t1.js"></script> -->
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<script src="t3.js"></script>
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<!-- the element with id="mocha" will contain test results -->
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<!-- run tests! -->
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</body>
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</html>
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4.5constructor/t2.js
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4.5constructor/t2.js
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function Calculator(){
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this.read = function(){
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this.a = +prompt('a?', 0);
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this.b = +prompt('b?', 0);
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};
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this.sum = function(){
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return this.a + this.b;
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};
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this.mul = function(){
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return this.a * this.b;
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};
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}
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4.5constructor/t3.js
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4.5constructor/t3.js
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function Accumulator(startingValue){
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this.value = startingValue;
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this.read = function(){
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new_value = +prompt("value?", 0);
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this.value += new_value;
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}
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}
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let accumulator = new Accumulator(1);
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accumulator.read();
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alert(accumulator.value);
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