If we have the object below:
var ObjectName = {
propertyOne: 1,
propertyTwo: 2
}
Do we need to include quotes around the object properties like this?
var ObjectName = {
'propertyOne': 1,
'propertyTwo': 2
}
Is the solution provided in Single quotes in JavaScript object literal accurate?
There is no need to quote object keys in most cases.
However, there are a few instances where quoting the key is necessary:
For example:
var ObjectName = {
"some-key": 42, // requires quotation due to special character
"class": 'example' // does not need quotes but may fail on certain browsers like IE
valid: 'yes' // no quotes needed
};
Using quotes around property names is essential when dealing with reserved words in JavaScript, such as for, in, function, etc. This prevents any confusion and syntax errors that may arise from using these keywords as property names.
Additionally, if you need to include spaces in your property names, it is necessary to enclose them in quotes. However, if your property names are simple and straightforward, without any potential conflicts or spaces, you have the flexibility to choose your preferred syntax.
Another scenario where quotes are required is when using JavaScript minifiers like Google Closure Compiler. These tools tend to replace all property names unless they are enclosed in quotes. By using quotes, you can ensure that your properties remain intact even after minification, which is crucial when exporting objects in a library or utilizing parameter objects.
In object literals, property names must be strings, numbers, or identifiers. If the name is a valid identifier, quotes are not necessary; otherwise, they follow the same rules as strings.
firstProperty and secondProperty are examples of valid identifiers that do not need quotes.
For further information, refer to page 65 of the specification.
When working with Javascript, it is not necessary to always use quotes. You have the option to use either ' or ", but if there is a conflict between your property name and a reserved word like null, you must use quotes. The answer that was referenced appears to be accurate.
As for JSON, it is recommended to surround strings (including object property names) with ".
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