learn this, but not very clear
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4.4this/index.html
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21
4.4this/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="t2.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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4.4this/t1.js
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4.4this/t1.js
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let calculator={
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a: 0,
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b: 0,
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read(){
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this.a = prompt("please type a");
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this.b = prompt("please type b");
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},
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sum(){
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return Number(this.a) + Number(this.b);
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},
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mul(){
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return this.a * this.b;
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}
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};
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calculator.read();
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alert(calculator.sum());
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alert(calculator.mul());
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4.4this/t2.js
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4.4this/t2.js
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let ladder = {
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step: 0,
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up() {
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this.step++;
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return this;
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},
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down() {
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this.step--;
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return this;
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},
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showStep: function() { // shows the current step
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alert( this.step );
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return this;
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}
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};
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ladder.up().up().down().showStep().down().showStep(); // shows 1 then 0
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