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JavaScript JavaScript Basics Hello, JavaScript! Debug JavaScript in the Console

Konstanze Pelargus
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Konstanze Pelargus
Front End Web Development Techdegree Student 6,148 Points
Posted by Konstanze Pelargus
.a{fill-rule:evenodd;}techdegree
Konstanze Pelargus
Front End Web Development Techdegree Student 6,148 Points

Strange error code

I have the first line of the text exactly wrong written as in the video and received the following error message. I took a screenshot but can't shore.

•Uncaught TypeError: Cannot read properties of null (reading 'clientWidth') at terminal.js:108:35 at window. doResize (terminal.js: 45:16) at r.<anonymous> (terminal.js:27:5) at r.emit (index.js: 83:1) at r.emit (index.js: 83:1) at r.onconnect (index.js: 83:1) at r.onpacket (index.js:83:1) r. canonymous> (index.js: 83:1) at r.emit (index.js:83:1 at r.ondecoded (index.js: 83:1) © • Uncaught TypeError: Cannot read properties of null (reading 'clientwidth')

terminal.js: 108

My missing quote marks are not detected. Here is the snapshot. I know it's only the first line but the error should be detected. https://w.trhou.se/7nnpevd21b

When I click on terminal.js:108 at the far right it takes me to sources and this is what I see:

return function (term) { var testChar = getTestChar (); var container = term.element.offsetParent; return { cols: Math. floor(container.clientwidthAntestchar.aftsetwidthing rows: Math. floor (container. clientHeight / testChar.offsetHeight) }; };

What does this mean?

1 Answer

Steven Parker
Steven Parker
231,271 Points
Steven Parker
Steven Parker
231,271 Points

Odd indeed! That error message seems to be referring to file names that don't exist at all in the snapshot!

I get a different response when I run the snapshot. The problem I see is caused by a missing quote mark:

alert(Hello, world!");     // current code, missing "
alert("Hello, world!");    // but should be this