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42 lines
1.3 KiB
42 lines
1.3 KiB
6 years ago
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INITIALISED = False
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babel = None
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babelPresetEs2015 = None
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def js6_to_js5(code):
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global INITIALISED, babel, babelPresetEs2015
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if not INITIALISED:
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import signal, warnings, time
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warnings.warn(
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'\nImporting babel.py for the first time - this can take some time. \nPlease note that currently Javascript 6 in Js2Py is unstable and slow. Use only for tiny scripts!'
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)
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from .babel import babel as _babel
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babel = _babel.Object.babel
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babelPresetEs2015 = _babel.Object.babelPresetEs2015
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# very weird hack. Somehow this helps babel to initialise properly!
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try:
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babel.transform('warmup', {'presets': {}})
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signal.alarm(2)
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def kill_it(a, b):
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raise KeyboardInterrupt('Better work next time!')
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signal.signal(signal.SIGALRM, kill_it)
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babel.transform('stuckInALoop', {
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'presets': babelPresetEs2015
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}).code
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for n in range(3):
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time.sleep(1)
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except:
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print("Initialised babel!")
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INITIALISED = True
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return babel.transform(code, {'presets': babelPresetEs2015}).code
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if __name__ == '__main__':
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print(js6_to_js5('obj={}; obj.x = function() {return () => this}'))
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print()
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print(js6_to_js5('const a = 1;'))
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