Strict mode Passingnon-Strict mode Passing
Features:
- ∅
// Copyright (C) 2016 The V8 Project authors. All rights reserved. // This code is governed by the BSD license found in the LICENSE file. /*--- esid: sec-number.prototype.toprecision description: > Return a string containing the the number value of this if precision is undefined info: | 20.1.3 Properties of the Number Prototype Object The Number prototype object is the intrinsic object %NumberPrototype%. The Number prototype object is an ordinary object. The Number prototype is itself a Number object; it has a [[NumberData]] internal slot with the value +0. [...] The abstract operation thisNumberValue(value) performs the following steps: 1. If Type(value) is Number, return value. 2. If Type(value) is Object and value has a [[NumberData]] internal slot, then a. Assert: value's [[NumberData]] internal slot is a Number value. b. Return the value of value's [[NumberData]] internal slot. 3. Throw a TypeError exception. Number.prototype.toPrecision ( precision ) 1. Let x be ? thisNumberValue(this value). 2. If precision is undefined, return ! ToString(x). [...] ---*/ var n = new Number(7); assert.sameValue(n.toPrecision(undefined), "7"); assert.sameValue((39).toPrecision(undefined), "39"); assert.sameValue(Number.prototype.toPrecision(), "0"); assert.sameValue((42).toPrecision(), "42");