read text from file

readFile.html

<input id="file" type="file"/>
<script>
    let input = document.getElementById("file");
    input.addEventListener("change", function () {
        if (this.files && this.files[0]) {
            let myFile = this.files[0];
            let reader = new FileReader();
            reader.addEventListener('load', function (e) {
                console.log(e.target.result);
            });
            reader.readAsBinaryString(myFile);
        }
    });
</script>