javascript - How to get the value of h1 tag using JS? -

i have 3 pages, 2 pages wordpress pages , other 1 custom page template form. 2 pages created using wp-job manager plugin. 1st page has had dropdown menu , contains list of jobs. on 2nd page description of job.

now, want value of h1 tag on 2nd page after user click input button , pass 3rd page , displayed in 1 of input textbox (position input textbox) using js.

how this?

here's link of 2nd page
3rd page

html:

<header class="entry-header">     <h1 class="entry-title">collections trainer</h1> </header> 

vanilla javascript solution (no framework required):

var h1text = document.queryselector(".entry-title").textcontent;