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Check if a dependency is available, try and load it if not, return availability state... |
Syntax
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var available = Check.has(file[, ver[, lazy]]) |
Parameters
| Parameter | Type | Mandatory | Notes | Util.js version |
|---|---|---|---|---|
| file | String |  | Filename of dependency | 1.0 |
| ver | Number Constant |  | Specify the required version of the file (exact match) or a version constant:
Default: Check.ANY_VERSION For more information on autolaoding, see: Check.paths[]. | 1.0 |
| lazy | Constant | | By default, Check.has() will attempt to autoload missing dependencies. If you want to prevent autoloading, specify Check.LAZY_LOAD | 1.0 |
Return Values
| Value | Type | Notes | Util.js version |
|---|---|---|---|
| true | Boolean | The dependency check was successful. | 1.0 |
| false | Boolean | The dependency check failed. | 1.0 |
| <error> | Error | An error occurred, most likely invalid parameters. | 1.0 |
Example
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function bleh() {
if (Check.has("foo.js", 1.2)) {
// do it the foo.js v1.2 way
} else {
// do it without any foo
}
} |
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function bleh() {
if (Check.has("foo.js", 1.2, Check.LAZY_LOAD)) {
// do it the foo.js v1.2 way
} else {
// do it without any foo
}
} |
Notes
You can get a list of all provided dependencies using Util API diagnostics (requires Diag API).
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Availability
Requires:
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ContentsJump to:
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Dependency CheckingTopics:
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