javascript - Do not show default value of the input field -

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मेरे पास एक इनपुट फ़ील्ड है 

  & lt; input id = 'spe_count' type = " पाठ "प्लेसहोल्डर =" संख्या "वर्ग =" फ़ॉर्म-नियंत्रण "डेटा-मूल-शीर्षक =" "शीर्षक =" "& gt;

और जैसा कि मुझे इसकी आवश्यकता है -1 मूल के साथ मैं इसे jQuery के साथ असाइन कर रहा हूं 

  $ ("# spe_count")। Val ( '-1');

और मुझे यह इनपुट फ़ील्ड मिलता है और यह मान 1 को अंदर देखता हूं, लेकिन मुझे क्या चाहिए कि यह इनपुट मान -1 के साथ है, लेकिन पृष्ठ पर यह खाली या खाली होगा प्लेसहोल्डर। और जब मैं मूल्य बदलता हूं, तो मैं ऐसा करना चाहता हूं, कि बॉक्स को खाली करना, मान हटाना, इसका मतलब है कि यह डिफ़ॉल्ट मान -1 है (शून्य से एक टाइपिंग नहीं, बल्कि सभी मानों को हटाना भी इसका मतलब शून्य है)

क्या यह संभव है? 

  # ("# spe_count") क्लिक करें। (Function () {var value = $ (this) .val (); अगर (value.length & lt; 1) {$ (this) .attr ("value", -1);}});

उपरोक्त कोड आपके उद्देश्य की पूर्ति करेगा।


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