97 lines
3.4 KiB
Handlebars
97 lines
3.4 KiB
Handlebars
<script>
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function autocomplete(input, proposals) {
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var currentFocus;
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function createCompletionContainer(id) {
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let div = document.createElement("DIV");
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div.setAttribute("id", id + "autocomplete-list");
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div.setAttribute("class", "autocomplete-items");
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return div;
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}
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function createCompletionProposal(inputElement, incomplete, complete) {
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let div = document.createElement("DIV");
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/*make the matching letters bold:*/
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const start = complete.toUpperCase().indexOf(incomplete.toUpperCase());
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div.innerHTML = complete.substr(0, start)
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+ "<strong>" + complete.substr(start, incomplete.length) + "</strong>"
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+ complete.substr(start+incomplete.length)
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/*insert a input field that will hold the current array item's value:*/
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+ "<input type='hidden' value='" + complete + "'>";
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/*execute a function when someone clicks on the item value (DIV element):*/
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div.addEventListener("click", function(e) {
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/*insert the value for the autocomplete text field:*/
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inputElement.value = this.getElementsByTagName("input")[0].value;
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/*close the list of autocompleted values, or any other open lists of autocompleted values:*/
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closeAllOpenedLists();
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});
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return div;
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}
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function addActive(x) {
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if (!x) return false;
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removeActive(x);
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if (currentFocus >= x.length) currentFocus = 0;
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if (currentFocus < 0) currentFocus = (x.length - 1);
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x[currentFocus].classList.add("autocomplete-active");
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}
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function removeActive(x) {
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for (var i = 0; i < x.length; i++) {
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x[i].classList.remove("autocomplete-active");
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}
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}
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function closeAllOpenedLists(elmnt) {
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/*close all autocomplete lists in the document, except the one passed as an argument:*/
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var x = document.getElementsByClassName("autocomplete-items");
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for (var i = 0; i < x.length; i++) {
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if (elmnt != x[i] && elmnt != input) {
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x[i].parentNode.removeChild(x[i]);
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}
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}
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}
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/*execute a function when someone writes in the text field:*/
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input.addEventListener("input", function(e) {
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const incomplete = this.value;
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closeAllOpenedLists();
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if (!incomplete) { return false; }
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currentFocus = -1;
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const container = createCompletionContainer(this.id)
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this.parentNode.appendChild(container);
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/*for each item in the array...*/
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for (let i = 0; i < proposals.length; i++) {
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/*check if the item starts with the same letters as the text field value:*/
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if (proposals[i].toUpperCase().includes(incomplete.toUpperCase())) {
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/*create a DIV element for each matching element:*/
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container.appendChild(createCompletionProposal(input, incomplete, proposals[i]));
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}
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}
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});
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/*execute a function presses a key on the keyboard:*/
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input.addEventListener("keydown", function(e) {
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var container = document.getElementById(this.id + "autocomplete-list")?.getElementsByTagName("div");
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if (e.keyCode == 40) {
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currentFocus++;
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addActive(container);
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} else if (e.keyCode == 38) { //up
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currentFocus--;
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addActive(container);
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} else if (e.keyCode == 13) {
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e.preventDefault();
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if (currentFocus > -1 && container) {
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container[currentFocus].click();
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}
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}
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});
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/*execute a function when someone clicks in the document:*/
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document.addEventListener("click", function (e) {
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closeAllOpenedLists(e.target);
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});
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}
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</script>
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