118 lines
4.6 KiB
JavaScript
118 lines
4.6 KiB
JavaScript
function autocomplete(inp, passedValues, style) {
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var currentFocus;
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/*execute a function when someone writes in the text field:*/
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inp.addEventListener("input", function(e) {
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var item, val = this.value;
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var parentContainer = document.getElementsByClassName('autocomplete-items-container')[0];
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/*close any already open lists of autocompleted values*/
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closeAllLists();
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if (!val) {
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parentContainer.style.paddingBottom = "0";
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return false;
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}
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currentFocus = -1;
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// Update some values of the parent container
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parentContainer.setAttribute("id", this.id + "-autocomplete-list");
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parentContainer.style.paddingBottom = "1rem";
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if(style["searchBackgroundColor"]) {
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parentContainer.style.backgroundColor = style["searchBackgroundColor"];
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}
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/*for each item in the array...*/
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Object.keys(passedValues).forEach((el, i, arr) => {
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/*check if the item starts with the same letters as the text field value:*/
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if (arr[i].toLowerCase().includes(val.toLowerCase())) {
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/*create a DIV element for each matching element:*/
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item = document.createElement("DIV");
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item.setAttribute("class", "autocomplete-item");
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// Add the url as an attribute
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item.setAttribute('url', passedValues[el]);
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if(style["searchBackgroundColor"]) {
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item.style.backgroundColor = style["searchBackgroundColor"];
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}
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if(style["searchColor"]) {
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item.style.color = style["searchColor"];
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}
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/*make the matching letters bold:*/
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item.innerHTML = "<strong>" + arr[i].substr(0, val.length) + "</strong>";
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item.innerHTML += arr[i].substr(val.length);
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/*insert a input field that will hold the current array item's value:*/
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item.innerHTML += "<input type='hidden' value='" + arr[i] + "'>";
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/*execute a function when someone clicks on the item value (DIV element):*/
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item.addEventListener("click", function(e) {
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/*insert the value for the autocomplete text field:*/
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inp.value = this.getElementsByTagName("input")[0].value;
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/*close the list of autocompleted values,
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(or any other open lists of autocompleted values:*/
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closeAllLists();
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});
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parentContainer.appendChild(item);
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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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inp.addEventListener("keydown", function(e) {
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var x = document.getElementById(this.id + "-autocomplete-list");
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if (x) x = x.getElementsByTagName("div");
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if (e.keyCode == 40) {
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/*If the arrow DOWN key is pressed,
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increase the currentFocus variable:*/
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currentFocus++;
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/*and and make the current item more visible:*/
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addActive(x);
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}
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else if (e.keyCode == 38) {
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/*If the arrow UP key is pressed,
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decrease the currentFocus variable:*/
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currentFocus--;
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/*and and make the current item more visible:*/
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addActive(x);
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}
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else if (e.keyCode == 13) {
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/*If the ENTER key is pressed, prevent the form from being submitted,*/
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if (currentFocus > -1) {
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e.preventDefault();
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/*and simulate a click on the "active" item:*/
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if (x) window.location = x[0].getAttribute('url');
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}
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}
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});
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function addActive(x) {
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/*a function to classify an item as "active":*/
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if (!x) return false;
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/*start by removing the "active" class on all items:*/
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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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/*add class "autocomplete-active":*/
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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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/*a function to remove the "active" class from all autocomplete items:*/
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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 closeAllLists(elmnt) {
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/*close all autocomplete lists in the document,
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except the one passed as an argument:*/
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document.getElementsByClassName("autocomplete-items-container")[0].innerHTML = "";
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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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closeAllLists(e.target);
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});
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} |