Microsoft Programming in HTML5 with JavaScript and CSS3 (70-480日本語版) - 70-480日本語 Exam Practice Test
Correct Answer: A
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Correct Answer: B
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Correct Answer:
Explanation
Box 1:
Box 2:
Box 3:
Note:
* The event object for a message event supports the following additional properties:
the data property contains the message,
the origin property retrieves the scheme, hostname and port of the document that invoked the postMessage method, the source property refers to the window object that contains the document that invoked the postMessage method, the lastEventId property returns the identifier of the last message.
Correct Answer: C,D
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Correct Answer:
Explanation
Reference: https://www.w3schools.com/Css/css3_multiple_columns.asp
Correct Answer: B
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Correct Answer: B
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Correct Answer: A
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Correct Answer: C
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<a href="help.html">Help</a>
Correct Answer:
Explanation
var para = document.createElement("a");
var attr = document.createAttribute("href");
attr.value = "help.html";
para.setAttributeNode(attr);
var node = document.createTextNode("Help");
para.appendChild(node);
var element = document.getElementById("navlist");
element.appendChild(para);