How Can I Effectively Call JavaScript Functions from HTML Buttons?

Call JavaScript Function with HTML Button

When using HTML to invoke JavaScript functions via buttons, certain nuances may arise. Here are common approaches and troubleshooting steps:

Button Event Handling Methods:

There are several ways to handle button events in HTML/DOM:

• Inline HTML:

  <input type="button" value="Capacity Chart" onclick="CapacityChart();">

• DOM Property:

  document.getElementById("clickMe").onclick = doFunction;

• Event Handler Function:

  var el = document.getElementById("clickMe");
  el.addEventListener("click", doFunction, false);

Troubleshooting CapacityChart() Function:

Issues with the CapacityChart() function can arise. Consider these potential fixes:

• Ensure the issue is not within CapacityChart() itself.

• Replace CapacityWindow.document.write(s); with:

  CapacityWindow.document.open("text/html");
  CapacityWindow.document.write(s);
  CapacityWindow.document.close();

Browser Compatibility:

Note that:

• document.all should be replaced with document.getElementById for cross-browser compatibility.
• It's recommended to ensure functionality in IE before troubleshooting cross-browser issues.

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