html elements find all css

<input type="submit" name="ctl00$MainContent$btnSearch" value="Search Now" onclick="return validateAge();" id="MainContent_btnSearch" class="btn btn-secondary btn-block">

Find the html element all css in a page.


simply register the function

var getCss = function(el) {

var style = window.getComputedStyle(el);

return Object.keys(style).reduce(function(acc, k) {

var name = style[k],

value = style.getPropertyValue(name);

if (value !== null) {

acc[name] = value;

}

return acc;

}, {});

};

and call the css function 

(MainContent_btnSearch).getCss();