Design Browser History LeetCode solution in JavaScript

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var BrowserHistory = function (homepage) {
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  this.page = {
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    url: homepage,
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    back: null,
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    next: null,
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  };
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};
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BrowserHistory.prototype.visit = function (url) {
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  this.page.next = {
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    url,
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    back: this.page,
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    next: null,
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  };
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  this.page = this.page.next;
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};
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BrowserHistory.prototype.back = function (steps) {
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  while (this.page.back && steps) {
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    this.page = this.page.back;
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    steps--;
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  }
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  return this.page.url;
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};
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BrowserHistory.prototype.forward = function (steps) {
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  while (this.page.next && steps) {
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    this.page = this.page.next;
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    steps--;
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  }
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  return this.page.url;
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};