how canI get expr:content value using JavaScript ??!!
<meta expr:content='data:blog.blogId' itemprop='blogId'/>
<meta expr:content='data:post.id' itemprop='postId'/>
i tryed the methode of getElementsByTagName("meta")
var x = document.getElementsByTagName("meta");
txt=x.expr:content;
but he give me undefined
Try using document.querySelectorAll() with selector "meta[expr\\:content]" , for loop , .getAttribute()
var metas = document.querySelectorAll("meta[expr\\:content]");
for (i = 0; i < metas.length; i++) {
console.log(metas[i].getAttribute("expr:content"))
}<meta expr:content='data:blog.blogId' itemprop='blogId' />
<meta expr:content='data:post.id' itemprop='postId' />
<!DOCTYPE html> <html> <body> <head> <span expr:content='data:blog.blogId' itemprop='blogId'/> <span expr:content='data:post.id' itemprop='postIds'/> </head> <button onclick="myFunction()">Test</button> <script> function myFunction() { var metas = document.querySelectorAll("meta[expr\\:content]"); for (i = 0; i < metas.length; i++) { txt=console.log(metas[i].getAttribute("expr:content")); alert (txt); } } </script> </body> </html> I tried this code but he didn't give me any answer
meta elements appear at html at comment stackoverflow.com/questions/34099978/… ? Why are span elements within head of document ? See original Question: "how can I get expr:content value from meta tag using javascript"'data:blog.blogId' value and 'data:post.id' value using javascript wish variable x = 'data:blog.blogId' value y = 'data:post.id' value using JavaScript to extract themfor loop , checking i jsfiddle jsfiddle.net/4vcdnmvg ; or filter by itemprop