split.js

/*
© 2023 Samuel Bradshaw
https://github.com/samuelbradshaw/transcript-tracer-js
*/


if (window.addEventListener) {
    window.addEventListener("resize", browserResize);
} else if (window.attachEvent) {
    window.attachEvent("onresize", browserResize);
}

function browserResize() {
    fixDragBtn();
}

var added = false;

var dragging = false;
var stack;
function fixDragBtn() {

  var leftpadding, dragleft, buttonwidth

  var containertop = Number(w3_getStyleValue(document.getElementById("container"), "top").replace("px", ""));

    leftareasize = Number(w3_getStyleValue(document.getElementById("left-area-wrapper"), "width").replace("px", ""));
    leftpadding = Number(w3_getStyleValue(document.getElementById("left-area"), "padding-left").replace("px", ""));
    buttonwidth = Number(w3_getStyleValue(document.getElementById("dragbar"), "width").replace("px", ""));
    leftareaheight = w3_getStyleValue(document.getElementById("left-area-wrapper"), "height");
  
    dragleft = leftareasize + leftpadding + (leftpadding / 2) - (buttonwidth / 2);

    document.getElementById("dragbar").style.width = "5px";
    document.getElementById("dragbar").style.top = containertop + "px";
    document.getElementById("dragbar").style.left = dragleft + "px";
    document.getElementById("dragbar").style.height = leftareaheight;
    document.getElementById("dragbar").style.cursor = "col-resize";

    document.getElementById("hello").style.height = "580px";  
  
}

function dragstart(e) {
  e.preventDefault();
  dragging = true;
}

function dragmove(e) {
  if (dragging)
  { 
    document.getElementById("shield").style.display = "block";

      var percentage = (e.pageX / window.innerWidth) * 100;
      if (percentage > 5 && percentage < 98) {
        var mainPercentage = 100-percentage;
        document.getElementById("left-area-container").style.width = percentage + "%";
        document.getElementById("right-area-container").style.width = mainPercentage + "%";
        fixDragBtn();
      }
  }
}

function dragend() {
  document.getElementById("shield").style.display = "none";
  dragging = false;
}

function initfn() {
if (window.addEventListener && document.getElementById("container") != null) {
  document.getElementById("dragbar").addEventListener("mousedown", function(e) {dragstart(e);});
  document.getElementById("dragbar").addEventListener("touchstart", function(e) {dragstart(e);});
  window.addEventListener("mousemove", function(e) {dragmove(e);});
  window.addEventListener("touchmove", function(e) {dragmove(e);});
  window.addEventListener("mouseup", dragend);
  window.addEventListener("touchend", dragend);
  window.addEventListener("load", fixDragBtn);
}
  fixDragBtn();
}

initfn();

function w3_getStyleValue(elmnt,style) {
    if (window.getComputedStyle) {
        return window.getComputedStyle(elmnt,null).getPropertyValue(style);
    } else {
        return elmnt.currentStyle[style];
    }
}

fixDragBtn();