Objective-C

JavaScript console

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Demonstrates console output using Chilkat JavaScript. Objective-C

#import <CkoStringBuilder.h>
#import <CkoJs.h>
#import <CkoJsonObject.h>

BOOL success = NO;

// This example demonstrates using the built-in console object.
// The Javascript run in this example is shown below.

// Load the JavaScript from a file.
CkoStringBuilder *sbScript = [[CkoStringBuilder alloc] init];
success = [sbScript LoadFile: @"qa_data/js_tests/test_console.js" charset: @"utf-8"];
if (success == NO) {
    NSLog(@"%@",sbScript.LastErrorText);
    return;
}

CkoJs *js = [[CkoJs alloc] init];
CkoJsonObject *result = [[CkoJsonObject alloc] init];

// Run the JavaScript
// Results (not console output) go to result.
// Note: Eval returns the completion value of the script. This is generally the value of the last evaluated expression.
// In this case, the last evaluated expression is console.log which does not calculate a value. Therefore, it returns undefined.
success = [js Eval: sbScript result: result];
if (success == NO) {
    NSLog(@"%@",sbScript.LastErrorText);
    return;
}

// We can look at the result, which is "undefined", which is normal and expected.
NSLog(@"%@",[result Emit]);
// The result JSON is: {"type":"undefined","value":"undefined"}

// The console output is retrieved by calling ConsoleOutputSb
CkoStringBuilder *sbOut = [[CkoStringBuilder alloc] init];
[js ConsoleOutputSb: sbOut];
NSLog(@"%@",[sbOut GetAsString]);