{"id":30,"date":"2008-06-24T10:44:34","date_gmt":"2008-06-24T16:44:34","guid":{"rendered":"http:\/\/www.n8williams.com\/devblog\/?p=30"},"modified":"2008-06-24T10:44:34","modified_gmt":"2008-06-24T16:44:34","slug":"javascript-substring-is-not-a-function-check-your-variable-content","status":"publish","type":"post","link":"https:\/\/n8williams.com\/devblog\/javascript_and_ajax\/javascript-substring-is-not-a-function-check-your-variable-content","title":{"rendered":"javascript substring is not a function – check your variable content"},"content":{"rendered":"

You’re trying to get the substring of a number, or something else, maybe undefined. <\/p>\n

trimAll(document.getElementById(“email”).value.length)<\/p>\n

should be<\/p>\n

trimAll(document.getElementById(“email”)).value.length<\/p>\n","protected":false},"excerpt":{"rendered":"

You’re trying to get the substring of a number, or something else, maybe undefined. trimAll(document.getElementById(“email”).value.length) should be trimAll(document.getElementById(“email”)).value.length<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[5],"tags":[],"yoast_head":"\njavascript substring is not a function - check your variable content - The Dev Pages<\/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:\/\/n8williams.com\/devblog\/javascript_and_ajax\/javascript-substring-is-not-a-function-check-your-variable-content\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"javascript substring is not a function - check your variable content - The Dev Pages\" \/>\n<meta property=\"og:description\" content=\"You’re trying to get the substring of a number, or something else, maybe undefined. trimAll(document.getElementById(“email”).value.length) should be trimAll(document.getElementById(“email”)).value.length\" \/>\n<meta property=\"og:url\" content=\"https:\/\/n8williams.com\/devblog\/javascript_and_ajax\/javascript-substring-is-not-a-function-check-your-variable-content\" \/>\n<meta property=\"og:site_name\" content=\"The Dev Pages\" \/>\n<meta property=\"article:published_time\" content=\"2008-06-24T16:44:34+00:00\" \/>\n<meta name=\"author\" content=\"Nate Admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@admin\" \/>\n<meta name=\"twitter:site\" content=\"@admin\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Nate Admin\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/n8williams.com\/devblog\/javascript_and_ajax\/javascript-substring-is-not-a-function-check-your-variable-content#article\",\"isPartOf\":{\"@id\":\"https:\/\/n8williams.com\/devblog\/javascript_and_ajax\/javascript-substring-is-not-a-function-check-your-variable-content\"},\"author\":{\"name\":\"Nate Admin\",\"@id\":\"https:\/\/n8williams.com\/devblog\/#\/schema\/person\/1c31624786b5382f1a811f0a01985757\"},\"headline\":\"javascript substring is not a function – check your variable content\",\"datePublished\":\"2008-06-24T16:44:34+00:00\",\"dateModified\":\"2008-06-24T16:44:34+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/n8williams.com\/devblog\/javascript_and_ajax\/javascript-substring-is-not-a-function-check-your-variable-content\"},\"wordCount\":39,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/n8williams.com\/devblog\/#\/schema\/person\/1c31624786b5382f1a811f0a01985757\"},\"articleSection\":[\"Javascript and AJAX\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/n8williams.com\/devblog\/javascript_and_ajax\/javascript-substring-is-not-a-function-check-your-variable-content#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/n8williams.com\/devblog\/javascript_and_ajax\/javascript-substring-is-not-a-function-check-your-variable-content\",\"url\":\"https:\/\/n8williams.com\/devblog\/javascript_and_ajax\/javascript-substring-is-not-a-function-check-your-variable-content\",\"name\":\"javascript substring is not a function - 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