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возврашает undefined
document.addEventListener("DOMContentLoaded", function() {
document.querySelector(".pages").addEventListener( "click", function(event) {
var target = event.target;
if (target = target.closest(".page")) {
var index = [].indexOf.call(document.querySelectorAll(".pages .page"));
document.querySelector(".action span").innerHTML = 'text' + ' ' + window["action" + (index+1)] + ' text';
if (target.querySelector("img")) {
alert("heloo world");
}
}
});
});
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