dramasea questions

• Why the visibility hidden must add position absolute in css?
• Question about if statement in function in javascript - how if the if statement return true but the function return false
• Segmentation fault (core dumped) Error in PyQt5
• What does media="screen" mean in css?
• How to detect browser rendering engine in javascript?
• How to sort numbers? [duplicate]
• Why class attribute cannot assign inline by javascript? [duplicate]
• What is the difference between slice() and substr() in JavaScript?
• what the difference between break with label and without label in javascript
• What does document.form mean in javascript?

dramasea answers