7e90d56024
* Proposal: Logical Assignment Operators https://github.com/jridgewell/proposal-logical-assignment I'm bringing it [back](https://github.com/babel/babel/pull/516). 😉 * Use expectPlugin * Add to stage 0 preset * Add logicalAssignment missing plugin log stuff
41 lines
647 B
JavaScript
41 lines
647 B
JavaScript
var x = 0;
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var sets = 0;
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var obj = {
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get x() {
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return x;
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},
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set x(value) {
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sets++;
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x = value;
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},
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};
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assert.equal(obj.x ||= 1, 1);
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assert.equal(sets, 1);
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assert.equal(obj.x ||= 2, 1);
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assert.equal(sets, 1);
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assert.equal(obj.x &&= 0, 0);
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assert.equal(sets, 2);
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assert.equal(obj.x &&= 3, 0);
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assert.equal(sets, 2);
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var gets = 0;
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var deep = {
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get obj() {
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gets++;
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return obj;
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},
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};
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assert.equal(deep.obj.x ||= 1, 1);
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assert.equal(gets, 1);
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assert.equal(deep.obj.x ||= 2, 1);
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assert.equal(gets, 2);
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assert.equal(deep.obj.x &&= 0, 0);
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assert.equal(gets, 3);
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assert.equal(deep.obj.x &&= 3, 0);
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assert.equal(gets, 4);
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