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POJavascript RegEx partial match
 

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    <p>I have a regular expression pattern, which validates for a three digit number</p> <pre><code>/^\d{3}$/.test("123") // true /^\d{3}$/.test("123.") // false </code></pre> <p>I want to use this regex as an input restriction on a textbox.</p> <p>Basically, if the new value matches, i allow the character to by typed, otherwise i prevent it.</p> <p>The problem is that no value will ever match, becase "1" is not a full match, and will not allow me to type it.</p> <p>Is it any way of testing a partial match for a regEx in javascript?</p> <pre><code>/^\d{3}$/.test("123") // true /^\d{3}$/.test("12") // "partial match" /^\d{3}$/.test("a12") // false </code></pre> <p><strong>EDIT</strong></p> <p>\d{3} was just an example. I need to use an email regex or a phone regex as input restriction.</p> <pre><code>"email" // true "email@" // true "email@@" // false "@yahoo.com" // false </code></pre> <p><strong>EDIT 2</strong></p> <p>I have a textBox plugin with input restriction based on a regular expression.</p> <p>The regular expression can be anything, a hex color Regex, for example: (#){1}([a-fA-F0-9]){6}</p> <p>I need to prevent user to insert characters which doesn't match the regex.</p> <p>For example, if the textbox is empty, the first allowed character would be "#".</p> <p>But if i test "#" character against the regex, it will return "false", because "#" by itself is not valid.</p> <pre><code>/^(#){1}([a-fA-F0-9]){6}$/.test("#") // false </code></pre> <p>But at the same time, "#" is partial valid because it respects the regex format (and i should allow user to type it)</p> <p>What i need to know is if i can verify if a string is a partial match of a regex, so i can allow the user to type the character.</p> <pre><code>/^(#){1}([a-fA-F0-9]){6}$/.test("#") // is a partial match, allow type /^(#){1}([a-fA-F0-9]){6}$/.test("#0") // is a partial match, allow type /^(#){1}([a-fA-F0-9]){6}$/.test("#00") // is a partial match, allow type /^(#){1}([a-fA-F0-9]){6}$/.test("#000") // is a partial match, allow type /^(#){1}([a-fA-F0-9]){6}$/.test("#0000") // is a partial match, allow type /^(#){1}([a-fA-F0-9]){6}$/.test("#00000") // is a partial match, allow type /^(#){1}([a-fA-F0-9]){6}$/.test("#000000") // is a partial match, allow type /^(#){1}([a-fA-F0-9]){6}$/.test("#000000D") // is not a match, prevent typing </code></pre>
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