I am looking to create a customized data filter that only displays items when a specific category is chosen. Most filters online display all items by default, but I want one that remains hidden until I choose to reveal them. If anyone has a tutorial or code snippet to help with this, please share - thank you!
If you encounter the issue, simply add an if statement to verify whether a value exists or not
let countries = ["India", "Us", "Iran", "Irak", "Israel"];
function filterResults(input) {
let result;
if (input.value.length > 0) {
result = countries
.filter((country) => country.toLowerCase().indexOf(input.value) > -1)
.sort(
(a, b) =>
a.toLowerCase().indexOf(this.filterTermValue) -
b.toLowerCase().indexOf(this.filterTermValue)
);
} else {
result = [];
}
console.log(result);
}<!DOCTYPE html>
<html>
<head></head>
<body>
<input type="text" onkeydown="filterData(this)" />
</body>
</html>To achieve the desired outcome, you can leverage Angular's NgForOf in combination with the Array.prototype.filter() method. Rather than just providing you with the solution, I encourage you to try implementing it yourself for a deeper grasp of its functionality.
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