javascript - Is it possible to get selectionchange-like events for an input box in Firefox? -


how can selected text inside input box in firefox?

this apparently fundamental difference in way javascript works between chrome , firefox. reproduce:

  • navigate www.google.com
  • open js console
  • type following line: document.addeventlistener("selectionchange", () => console.log(document.getselection().tostring()))
  • type "text" google search box , not hit enter
  • use mouse select different portions of "text" in search box

in chrome, see event raised selected text within input element. consistent across various web pages use input fields. in firefox, event raised selections outside input, when text in box selected, no event raised.

i have not found explicit reference difference in mozilla documentation, nor have found mention of on other web page.

related different question

firefox web extension “selectionchange” older question, , dom.select_events.enabled config attribute defaulted true in ff 56. there second config attribute, dom.select_events.textcontrols.enabled seems i'm looking for, changing value true doesn't seem have effect.

additional info (edit 1)

apparently there isn't way selected text in textbox in ff? following code doesn't work:

setinterval(() => console.log(document.getselection().tostring()), 1000)

in ff, never return selected text in input field. in chrome, will.

is feature gap in ff? there no other way extract selected text form field?

based on this answer have been able create following:

window.addeventlistener('mouseup', function () {     selection = getselectedtext(); });   function getselectedtext() {     let elem = document.activeelement;     let elemtype = elem ? elem.tagname.tolowercase() : 'none';     if (elemtype === 'input' || elemtype === 'textarea') {         return elem.value.substr(elem.selectionstart, elem.selectionend - elem.selectionstart);     }      if (window.getselection) {         return window.getselection().tostring();     }      if (document.selection && document.selection.type !== 'control') {         return document.selection.createrange().text;     }     return ''; }

my testing far shows seems work both chrome , firefox.


Comments

Post a Comment

Popular posts from this blog

Is there a better way to structure post methods in Class Based Views -

i'm using class based views in django , never specify url in ajax calls , omit action parameter in form because know these requests go through post method of class based view. notice view - profile page make many requests depending on user updating on page - post method become convoluted , if/else mess example: def post(self, request, *args, **kwargs): # handle user changing available date if request.post.get('availabledate') != none: self.updateavailabledate(request) return jsonresponse({'result':'success'}) if request.post.get('newprojectname') != none: creative_user = creativeuserprofile.objects.get(id = request.user.id) project = project.create_project(creative_user, request.post['newprojectname']) project.save() return jsonresponse({'projectid': project.id }) if request.post.get('projectimage') != none , request.files['file']: proj
Read more

performance - Why is XCHG reg, reg a 3 micro-op instruction on modern Intel architectures? -

i'm doing micro-optimization on performance critical part of code , came across sequence of instructions (in at&t syntax): add %rax, %rbx mov %rdx, %rax mov %rbx, %rdx i thought had use case xchg allow me shave instruction , write: add %rbx, %rax xchg %rax, %rdx however, dimay found agner fog's instruction tables , xchg 3 micro-op instruction 2 cycle latency on sandy bridge, ivy bridge, broadwell, haswell , skylake. 3 whole micro-ops , 2 cycles of latency! 3 micro-ops throws off 4-1-1-1 cadence , 2 cycle latency makes worse original in best case since last 2 instructions in original might execute in parallel. now... cpu might breaking instruction micro-ops equivalent to: mov %rax, %tmp mov %rdx, %rax mov %tmp, %rdx where tmp anonymous internal register , suppose last 2 micro-ops run in parallel latency 2 cycles. given register renaming occurs on these micro-architectures, though, doesn't make sense me done way. why wouldn't register renamer
Read more

jquery - Responsive Navbar with Sub Navbar -

good day, forgive me nav vocabulary not best. if question confusing apologize. i'm working on navigation bar needs centered on page @ 768px , above. items in nav open (or perhaps toggle) subnav lives directly below. these nav should appear centered on page. i have been able work through responsive portion of nav bar, having main items align vertically , sub nav menu of each item roll out below, , gave them indent separation. working well. however, issue not responsive side, behavior @ width greater 768px. happens toggling menu's sub navigation pushes other main items down page below sub nav. here's code: $(document).ready(function () { //stick in fixed 100% height behind navbar don't wrap $('#slide-nav.navbar-inverse').after($('<div class="inverse" id="navbar-height-col"></div>')); $('#slide-nav.navbar-default').after($('<div id="navbar-height-col"></d
Read more