{"id":17354,"date":"2022-10-24T07:16:55","date_gmt":"2022-10-24T01:46:55","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-check-with-javascript-if-a-textarea-value-is-numeric-closed\/"},"modified":"2022-10-24T07:16:55","modified_gmt":"2022-10-24T01:46:55","slug":"solved-check-with-javascript-if-a-textarea-value-is-numeric-closed","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-check-with-javascript-if-a-textarea-value-is-numeric-closed\/","title":{"rendered":"[Solved] Check with Javascript if a textarea value is numeric [closed]"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-11973407\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"11973407\" data-parentid=\"11973197\" data-score=\"1\" data-position-on-page=\"1\" data-highest-scored=\"1\" data-question-has-accepted-highest-score=\"1\" itemprop=\"acceptedAnswer\" itemscope itemtype=\"https:\/\/schema.org\/Answer\">\n<div class=\"post-layout\">\n<div class=\"votecell post-layout--left\"><\/div>\n<div class=\"answercell post-layout--right\">\n<div class=\"s-prose js-post-body\" itemprop=\"text\">\n<p><strong>HTML:<\/strong><\/p>\n<p><code>&lt;textarea id=\"text\"&gt;&lt;\/textarea&gt;\u200b<\/code><\/p>\n<p><strong>JavaScript:<\/strong><\/p>\n<pre><code>var re=\/\\d\/,\n    allowedCodes = [37, 39, 8, 9], \/\/ left and right arrows, backspace and tab\n    text = document.getElementById('text');\n\ntext.onkeydown = function(e) {\n    var code;\n    if(window.event) { \/\/ IE8 and earlier\n        code = e.keyCode;\n    } else if(e.which) { \/\/ IE9\/Firefox\/Chrome\/Opera\/Safari\n        code = e.which;\n    }\n    if(allowedCodes.indexOf(code) &gt; -1) {\n        return true;\n    }\n    return !e.shiftKey &amp;&amp; re.test(String.fromCharCode(code));\n};\u200b\n<\/code><\/pre>\n<p><strong><a rel=\"nofollow noopener\" target=\"_blank\" href=\"http:\/\/jsfiddle.net\/f0t0n\/KuZEB\/\">Demo<\/a><\/strong><\/p>\n<\/p><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\"><\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved Check with Javascript if a textarea value is numeric [closed] <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] HTML: &lt;textarea id=&#8221;text&#8221;&gt;&lt;\/textarea&gt;\u200b JavaScript: var re=\/\\d\/, allowedCodes = [37, 39, 8, 9], \/\/ left and right arrows, backspace and tab text = document.getElementById(&#8216;text&#8217;); text.onkeydown = function(e) { var code; if(window.event) { \/\/ IE8 and earlier code = e.keyCode; } else if(e.which) { \/\/ IE9\/Firefox\/Chrome\/Opera\/Safari code = e.which; } if(allowedCodes.indexOf(code) &gt; -1) { return true; &#8230; <a title=\"[Solved] Check with Javascript if a textarea value is numeric [closed]\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-check-with-javascript-if-a-textarea-value-is-numeric-closed\/\" aria-label=\"More on [Solved] Check with Javascript if a textarea value is numeric [closed]\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[797,346,333,2990],"class_list":["post-17354","post","type-post","status-publish","format-standard","hentry","category-solved","tag-forms","tag-html","tag-javascript","tag-textarea"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] Check with Javascript if a textarea value is numeric [closed] - JassWeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jassweb.com\/solved\/solved-check-with-javascript-if-a-textarea-value-is-numeric-closed\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Check with Javascript if a textarea value is numeric [closed] - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] HTML: &lt;textarea id=&quot;text&quot;&gt;&lt;\/textarea&gt;\u200b JavaScript: var re=\/d\/, allowedCodes = [37, 39, 8, 9], \/\/ left and right arrows, backspace and tab text = document.getElementById(&#039;text&#039;); text.onkeydown = function(e) { var code; if(window.event) { \/\/ IE8 and earlier code = e.keyCode; } else if(e.which) { \/\/ IE9\/Firefox\/Chrome\/Opera\/Safari code = e.which; } if(allowedCodes.indexOf(code) &gt; -1) { return true; ... 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