javascript1 pixel Gif as a new m

javascript - 1 pixel Gif as a new measure tool? o_O BLANK_IMAGE_URL what is it for? - Stack Overflow
I'm reading ExtJs documantaion.. there is a BLANK_IMAGE_URL property... documantation says that it
javascript1 pixel Gif as a new measure tool oO BLANKIMAGEURL what is it forStack Overflow
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