{"id":21904,"date":"2022-11-16T15:34:19","date_gmt":"2022-11-16T10:04:19","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-what-is-the-zero-index-in-getelementsbytagname\/"},"modified":"2022-11-16T15:34:19","modified_gmt":"2022-11-16T10:04:19","slug":"solved-what-is-the-zero-index-in-getelementsbytagname","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-what-is-the-zero-index-in-getelementsbytagname\/","title":{"rendered":"[Solved] What is the zero index in getElementsByTagName?"},"content":{"rendered":"

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var js = document.createElement('script');\njs.src=\"https:\/\/stackoverflow.com\/questions\/45500080\/myscript.js\";\n\ndocument.getElementsByTagName('head')[0].appendChild(js);\n<\/code><\/pre>\n
You get all head elements (there should be only one)<\/strong> and you add the script there so the result is<\/p>\n
<html>\n  <head>\n    <script>\n    ...\n<\/code><\/pre>\n
if there’s no head in the document, most browsers will create the head element even if the tag is not there.<\/p>\n
Have a look at this, it might can help.
\nhttp:\/\/www.jspatterns.com\/the-ridiculous-case-of-adding-a-script-element\/<\/a><\/p>\n<\/p><\/div>\n
<\/div>\n<\/div>\n
            1<\/span> <\/p><\/div>\n<\/div>\n
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solved What is the zero index in getElementsByTagName? <\/p>\n","protected":false},"excerpt":{"rendered":"
[ad_1] var js = document.createElement(‘script’); js.src=”https:\/\/stackoverflow.com\/questions\/45500080\/myscript.js”; document.getElementsByTagName(‘head’)[0].appendChild(js); You get all head elements (there should be only one) and you add the script there so the result is <html> <head> <script> … if there’s no head in the document, most browsers will create the head element even if the tag is not there. Have a look … 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":[4955,333],"class_list":["post-21904","post","type-post","status-publish","format-standard","hentry","category-solved","tag-getelementsbytagname","tag-javascript"],"yoast_head":"\n[Solved] What is the zero index in getElementsByTagName? - 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-what-is-the-zero-index-in-getelementsbytagname\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] What is the zero index in getElementsByTagName? - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] var js = document.createElement('script'); js.src="https:\/\/stackoverflow.com\/questions\/45500080\/myscript.js"; document.getElementsByTagName('head')[0].appendChild(js); You get all head elements (there should be only one) and you add the script there so the result is <html> <head> <script> ... if there’s no head in the document, most browsers will create the head element even if the tag is not there. Have a look ... Read more\" \/>\n<meta property=\"og:url\" content=\"https:\/\/jassweb.com\/solved\/solved-what-is-the-zero-index-in-getelementsbytagname\/\" \/>\n<meta property=\"og:site_name\" content=\"JassWeb\" \/>\n<meta property=\"article:published_time\" content=\"2022-11-16T10:04:19+00:00\" \/>\n<meta name=\"author\" content=\"Kirat\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Kirat\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/jassweb.com\\\/solved\\\/solved-what-is-the-zero-index-in-getelementsbytagname\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/jassweb.com\\\/solved\\\/solved-what-is-the-zero-index-in-getelementsbytagname\\\/\"},\"author\":{\"name\":\"Kirat\",\"@id\":\"https:\\\/\\\/jassweb.com\\\/solved\\\/#\\\/schema\\\/person\\\/65c9c7b7958150c0dc8371fa35dd7c31\"},\"headline\":\"[Solved] What is the zero index in getElementsByTagName?\",\"datePublished\":\"2022-11-16T10:04:19+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/jassweb.com\\\/solved\\\/solved-what-is-the-zero-index-in-getelementsbytagname\\\/\"},\"wordCount\":74,\"publisher\":{\"@id\":\"https:\\\/\\\/jassweb.com\\\/solved\\\/#organization\"},\"keywords\":[\"getelementsbytagname\",\"javascript\"],\"articleSection\":[\"Solved\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/jassweb.com\\\/solved\\\/solved-what-is-the-zero-index-in-getelementsbytagname\\\/\",\"url\":\"https:\\\/\\\/jassweb.com\\\/solved\\\/solved-what-is-the-zero-index-in-getelementsbytagname\\\/\",\"name\":\"[Solved] What is the zero index in getElementsByTagName? 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