From 4b1a9203c547c019fc5398082ae19a3f3d4c3efe Mon Sep 17 00:00:00 2001
From: Peter Bengtsson <mail@peterbe.com>
Date: Tue, 8 Dec 2020 14:41:15 -0500
Subject: initial commit

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+---
+title: String.prototype.startsWith()
+slug: Web/JavaScript/Reference/Global_Objects/String/startsWith
+translation_of: Web/JavaScript/Reference/Global_Objects/String/startsWith
+---
+<div>{{JSRef}}</div>
+
+<p dir="rtl"><span class="seoSummary"><strong><code>startsWith()</code></strong></span><br>
+ <span class="seoSummary">.طريقة يمكنك<strong> تحقق</strong> بها<strong> إن كان </strong><code>نص</code> <strong>يبدء بالعبارة ما</strong> و تعيد لك<code> صحيح </code>أو <code>خطأ</code> </span></p>
+
+<div>{{EmbedInteractiveExample("pages/js/string-startswith.html")}}</div>
+
+
+
+<h2 dir="rtl" id="تركيب_الجملة_Syntax">تركيب الجملة | Syntax</h2>
+
+<pre class="syntaxbox"><var>str</var>.startsWith(<var>searchString</var>[, <var>position</var>])</pre>
+
+<h3 dir="rtl" id="المعاملات_Parameters">المعاملات | Parameters</h3>
+
+<dl>
+ <dt><code>searchString</code></dt>
+ <dd dir="rtl">العبارة<strong> المبحوث عنها</strong> في<strong><code>النص.</code></strong></dd>
+ <dt><code>position </code>{{optional_inline}}</dt>
+ <dd dir="rtl">مكان الذي<strong> يبدأ البحث منه </strong>في<code><strong>النص </strong></code>  <strong>الإفتراضي 0</strong></dd>
+</dl>
+
+<h3 dir="rtl" id="القيمة_العائدة_Return_value">القيمة العائدة | Return value</h3>
+
+<p dir="rtl"><strong>العائد</strong> يكون<strong> صحيح</strong> إذا وجد <strong>تطابق</strong><br>
+ و إن <strong>لم يجيد تطابق</strong> يعيد لك <strong>خطأ</strong></p>
+
+<h2 dir="rtl" id="الوصف_Description">الوصف | Description</h2>
+
+<p dir="rtl"><strong><code>هذه الطريقة حساسة إتجاه الحروف<br>
+ case-sensitive</code></strong></p>
+
+<h2 dir="rtl" id="أمثلة_Examples">أمثلة | Examples</h2>
+
+<h3 id="Using_startsWith()">Using <code>startsWith()</code></h3>
+
+<pre class="brush: js">//startswith
+var str = 'To be, or not to be, that is the question.';
+
+console.log(str.startsWith('To be'));         // true
+console.log(str.startsWith('not to be'));     // false
+console.log(str.startsWith('not to be', 10)); // true
+</pre>
+
+<h2 id="Polyfill">Polyfill</h2>
+
+<p>This method has been added to the ECMAScript 2015 specification and may not be available in all JavaScript implementations yet. However, you can polyfill <code>String.prototype.startsWith()</code> with the following snippet:</p>
+
+<pre class="brush: js">if (!String.prototype.startsWith) {
+    Object.defineProperty(String.prototype, 'startsWith', {
+        value: function(search, pos) {
+            pos = !pos || pos &lt; 0 ? 0 : +pos;
+            return this.substring(pos, pos + search.length) === search;
+        }
+    });
+}
+</pre>
+
+<p>A more robust (fully ES2015 specification compliant), but less performant and compact, Polyfill is available <a href="https://github.com/mathiasbynens/String.prototype.startsWith">on GitHub by Mathias Bynens</a>.</p>
+
+<h2 id="Specifications">Specifications</h2>
+
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <th scope="col">Specification</th>
+   <th scope="col">Status</th>
+   <th scope="col">Comment</th>
+  </tr>
+  <tr>
+   <td>{{SpecName('ES2015', '#sec-string.prototype.startswith', 'String.prototype.startsWith')}}</td>
+   <td>{{Spec2('ES2015')}}</td>
+   <td>Initial definition.</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ESDraft', '#sec-string.prototype.startswith', 'String.prototype.startsWith')}}</td>
+   <td>{{Spec2('ESDraft')}}</td>
+   <td></td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 dir="rtl" id="توافق_مع_متصفحات">توافق مع متصفحات</h2>
+
+<p class="hidden">The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out <a href="https://github.com/mdn/browser-compat-data">https://github.com/mdn/browser-compat-data</a> and send us a pull request.</p>
+
+<p>{{Compat("javascript.builtins.String.startsWith")}}</p>
+
+<h2 dir="rtl" id="ذات_صلة">ذات صلة</h2>
+
+<ul>
+ <li>{{jsxref("String.prototype.endsWith()")}}</li>
+ <li>{{jsxref("String.prototype.includes()")}}</li>
+ <li>{{jsxref("String.prototype.indexOf()")}}</li>
+ <li>{{jsxref("String.prototype.lastIndexOf()")}}</li>
+</ul>
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