To press button (and activate the underlying action sequence) when a text input contains a specific text, put the following code to your app’s JavaScript window. Modify your screen and variable names accordingly.
function onScreenShown(CurrentScreen) { if (CurrentScreen === 's1') { var input1 = document.getElementById('s1_i1'); input1.addEventListener("change", function() { var str1 = input1.value; if (str1.indexOf('X') !== -1) { var button1 = document.getElementById('s1_b2'); P55ButtonClick(button1); } }); } }