javascript - Adding fade function to JS script? -

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so have basic script alternates between 3 images , i'd add simple fadein/fadeout/fadeto or whatever looks best it's not clunky. how can achieve this? or, there better way?

function displaynextimage() {     x = (x === images.length - 1) ? 0 : x + 1;     document.getelementbyid("img").src = images[x];     } function displaypreviousimage() {     x = (x <= 0) ? images.length - 1 : x - 1;     document.getelementbyid("img").src = images[x];     } function starttimer() {     setinterval(displaynextimage, 3000);     }     var images = [], x = -1;     images[0] = "assets/img/logo1.png";     images[1] = "assets/img/logo2.png";     images[2] = "assets/img/logo3.png";

you can set opacity of images before change src:

function displaynextimage() {     x = (x === images.length - 1) ? 0 : x + 1;     var imgvar = document.getelementbyid("img");     imgvar.classlist.add("fadeout");     settimeout(function() {         imgvar.src = images[x];         imgvar.classlist.remove("fadeout");     }, 500); } function displaypreviousimage() {     x = (x <= 0) ? images.length - 1 : x - 1;     var imgvar = document.getelementbyid("img");     imgvar.classlist.add("fadeout");     settimeout(function() {         imgvar.src = images[x];         imgvar.classlist.remove("fadeout");     }, 500); } function starttimer() {     setinterval(displaynextimage, 3000); }     var images = [], x = -1;     images[0] = "assets/img/logo1.png";     images[1] = "assets/img/logo2.png";     images[2] = "assets/img/logo3.png";

and in css:

img {      opacity: 1;      transition: opacity 500ms ease-in-out; } img.fadeout {     opacity: 0; }

note: added 500ms timeout in javascript because suspect otherwise animation wouldn't visible @ because instantly go visible invisible visible again.





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